| - | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Athlete | Sex | First Appearance | Last Appearance | Appearances | Colleges | Race Types |
|---|---|---|---|---|---|---|
| Ollie Back | m | 2012-07-18 | 2012-07-18 | 2 | Liverpool | 100m |
| Ola Bademosi | m | 2015-02-06 | 2016-04-16 | 3 | TCD | 60m, LJ |
| Kevin Bader | m | 2011-03-12 | 2011-03-12 | 1 | UCC | XC |
| Yousef Bader | m | 2004-04-16 | 2004-04-17 | 2 | RCSI | 4x100m, SP |
| Tomiwa Badun | m | 2019-02-08 | 2019-04-06 | 3 | IT Carlow | 800m, LJ |
| Robert Baer | m | 2002-11-16 | 2007-11-17 | 6 | UL | 1500m, Road |
| Jake Bagge | m | 2021-11-13 | 2024-11-08 | 11 | UL | 800m, Road, XC |
| J.P. Baggott | m | 2001-12-07 | 2002-12-07 | 3 | IT Tralee | 4x200m, 60m |
| M. Bagwanadeen | m | 1978-05-05 | 1978-05-06 | 2 | TCD | 100m, 200m |
| Aidan Bailey | m | 2002-11-16 | 2006-03-04 | 11 | DCU, IUAA | 1500m, 5000m, Road, XC |
| J. Bailey | m | 1975-05-21 | 1975-05-21 | 1 | UCD | 4x100m |
| John Bailey | m | 1971-05-07 | 1972-03-04 | 4 | IUAA, QUB | 10000m, 5000m, XC |
| P. Bailey | m | 1975-05-02 | 1976-05-11 | 8 | UCD | 200m, LJ, TJ |
| Paul Bailey | m | 1988-04-29 | 1988-04-30 | 1 | TCD | HJ |
| Stephen Bailey | m | 2014-02-07 | 2014-04-12 | 3 | DKIT | JT, LJ, TJ |
| Chris Baillie | m | 2014-05-31 | 2014-05-31 | 1 | SAL Select | 110mH |
| H.W.C. Baillie | m | 1938-07-06 | 1939-07-01 | 2 | IUAA | JTo |
| John Baillie | m | 1976-03-06 | 1977-05-07 | 3 | QUB | 3000mSC, 5000m, XC |
| Alan Baird | m | 2000-06-20 | 2007-12-09 | 18 | NI U23, QUB | 100m, 200m, 4x100m, 4x200m, 60m |
| Callum Baird | m | 2023-04-21 | 2023-04-22 | 2 | UU | 200m |
| David John Baird | m | 1968-11-30 | 1972-06-11 | 12 | IUAA, TCD | 110mH, 400mH, 440yH, 800m, 880y, XC |
| Garrett Baird | m | 1992-04-24 | 1992-04-25 | 1 | QUB | 400m |
| Simon Baird | m | 1983-05-06 | 1987-05-09 | 13 | QUB | 100m, 200m, 4x100m |
| E. Balbirnie | m | 1986-03-08 | 1986-03-08 | 1 | NIHED | XC |
| Alnis Balchaites | m | 2018-11-17 | 2019-03-02 | 2 | UCC | Road, XC |
| Adrien Baldy | m | 2019-04-05 | 2019-04-06 | 1 | IT Sligo | 5000m |
| Benjamin Ball | m | 1934-05-26 | 1934-05-26 | 1 | TCD | Mile |
| John Ball | m | 2014-05-31 | 2014-05-31 | 1 | SAL Select | 800m |
| Ray Ball | m | 1946-07-14 | 1948-05-22 | 7 | UCD | 440y, 4x440y, 880y, Mile |
| Faroq Balogun | m | 2016-02-12 | 2016-02-12 | 2 | IT Tallaght | 200m, 60m |
| James Henry Bamber | m | 1931-05-30 | 1933-05-27 | 3 | TCD | 120yH |
| Amando Bamisile | m | 2012-07-18 | 2012-07-18 | 1 | Willowfield Harriers | 800m |
| David Bancroft | m | 1994-01-21 | 1994-04-23 | 5 | TCD | 3000mW, 400m, JT, LJ, XC |
| Nikola Banek | m | 2022-01-29 | 2022-01-29 | 3 | UG | 200m, 4x200m |
| Johnson Banguara | m | 2024-04-05 | 2024-04-06 | 2 | ATU | 100m |
| Oran Banin | m | 1998-04-24 | 1998-04-25 | 2 | UL | 400mH |
| Alamin Bankole | m | 2022-01-29 | 2024-04-06 | 19 | TUD | 100m, 200m, 4x100m, 4x200m, 4x400m, 60m, HJ |
| D. Bannin | m | 1951-05-26 | 1953-07-15 | 3 | UCD | JTo |
| O. Bannon | m | 1995-04-21 | 1995-04-22 | 1 | UL | 400mH |
| Ranjit Banwait | m | 2012-11-17 | 2012-11-17 | 1 | RCSI | Road |
| Fabrizio Baraldi | m | 1995-06-17 | 1995-06-17 | 2 | UCD | DT, SP |
| Alexis Barau | m | 2023-01-28 | 2023-03-04 | 2 | TCD | 800m, XC |
| John J.M. Barber | m | 1970-05-13 | 1970-05-13 | 1 | TCD | 100m |
| John Morgan "Jack" Barber | m | 1938-07-06 | 1939-07-01 | 5 | IUAA | 100y, 220y, 440y, 220yx2, 440y |
| Paolo Barbero | m | 2017-02-10 | 2017-04-08 | 2 | AIT | 2000mW, 200m |
| John Barbour | m | 1950-03-18 | 1950-03-18 | 1 | SU | XC |
| Paul Barbour | m | 2015-05-31 | 2015-05-31 | 1 | GST | 5000m |
| P. Barboure | m | 1993-06-22 | 1993-06-22 | 1 | GST | JT |
| Matthew Barclay | m | 1999-12-03 | 1999-12-04 | 2 | LYIT | 200m, 60m |
| T. Bardon | m | 1976-03-06 | 1976-03-06 | 1 | SPM | XC |
| E. Barker | m | 1995-03-11 | 1995-03-11 | 1 | Birmingham | 800m |
| Lee Barlow | m | 2012-07-18 | 2012-07-18 | 1 | Olympian | JT |
| Eivind Barna | m | 2001-04-20 | 2001-04-21 | 1 | RCSI | HJ |
| Tony Barnett | m | 2005-04-22 | 2007-04-14 | 12 | UL | 100m, 4x100m, 60m |
| Husani Barnwell | m | 1995-06-17 | 1995-06-17 | 1 | H & Y | LJ |
| Peter Barr | m | 1993-06-22 | 1993-06-22 | 1 | NI U20 | LJ |
| Thomas Barr | m | 2011-02-05 | 2017-04-08 | 47 | UL | 200m, 400m, 400mH, 4x100m, 4x200m, 4x400m, 60mH, HJ |
| A. Barrett | m | 1995-04-21 | 1995-04-22 | 1 | UL | PV |
| Anthony Barrett | m | 1978-06-30 | 1978-06-30 | 1 | President's Select | LJ |
| Cal Barrett | m | 1998-04-24 | 2000-04-15 | 6 | UL | 35lbWfD, HT, SP |
| Carl Barrett | m | 2000-04-14 | 2000-04-15 | 1 | UL | SP |
| Ian Barrett | m | 2007-02-24 | 2008-04-19 | 3 | DCU | 400mH, Road, XC |
| N. Barrett | m | 1939-05-27 | 1939-05-27 | 1 | UCC | 120yH |
| Olan Barrett | m | 2009-11-14 | 2009-11-14 | 1 | UCC | Road |
| Joseph Barrett Gibson | m | 2019-04-05 | 2019-04-06 | 1 | UL | 100m |
| Gordon Barrie | m | 1994-06-28 | 1996-06-25 | 6 | SU | 1500m, 5000m, 800m |
| Alan Barro | m | 2001-04-20 | 2001-04-21 | 1 | UCC | 5000m |
| Aaron Barron | m | 2016-02-12 | 2016-04-16 | 7 | UCC | 200m, 4x100m, 4x400m, 60m |
| Aaron Barron | m | 2022-01-29 | 2022-04-09 | 3 | UCC | 400m, 4x400m |
| Callum Barron | m | 2024-10-19 | 2024-11-08 | 2 | UCD | Road, XC |
| Manuel Barros | m | 2010-03-13 | 2010-04-24 | 3 | CIT | 3000mSC, TJ, XC |
| Adrian George Barry | m | 1979-05-04 | 1983-05-07 | 6 | TCD | 400m, 400mH, XC |
| Alan Barry | m | 2000-04-14 | 2001-04-07 | 2 | UCC | 3000mSC, XC |
| Cathal Barry | m | 2009-04-24 | 2010-04-24 | 2 | NUIM | HT |
| Colin Barry | m | 2003-03-09 | 2003-04-26 | 2 | IT Carlow | 3000mSC, XC |
| H. Barry | m | 1972-03-04 | 1972-03-04 | 1 | NUU | XC |
| J.J. Barry | m | 1980-05-02 | 1984-05-05 | 12 | UCD | 400m, 400mH, 4x100m, 4x400m |
| James Barry | m | 2002-03-09 | 2002-04-20 | 2 | CIT | 5000m, XC |
| Joe Barry | m | 2008-04-18 | 2011-04-30 | 21 | TCD | 100m, 200m, 400m, 4x100m, 4x200m, 4x400m, Road, TJ |
| Joe Barry | m | 2009-11-14 | 2010-04-24 | 12 | CIT | 60mH, CE, HJ, LJ, Road, SP, TJ |
| John J. "J.J." Barry | m | 1987-05-08 | 1990-04-28 | 8 | TCD | 400m, 400mH |
| Kevin Barry | m | 2000-11-12 | 2002-04-20 | 5 | UCC | 800m, Road |
| Killian Barry | m | 2016-04-15 | 2017-04-08 | 3 | UL | 35lbWfD, HT |
| Killian Barry | m | 2019-04-05 | 2019-04-06 | 1 | MU | HT |
| Killian Barry | m | 2023-04-21 | 2023-04-22 | 1 | UCD | HT |
| Mark Barry | m | 1990-04-27 | 1992-04-25 | 2 | UCD | TJ |
| Maurice A.P. Barry | m | 1977-05-06 | 1979-05-23 | 6 | TCD | 200m, 400m, 4x100m |
| Michael Barry | m | 2008-03-08 | 2008-03-08 | 1 | GST | XC |
| Ronan Barry | m | 2002-12-06 | 2004-02-07 | 4 | WIT | 200m, 60m, PV |
| Stephen Bartley | m | 1994-01-21 | 1994-04-23 | 4 | UU | JT, LJ, SP |
| Eoin Barton | m | 2016-04-15 | 2016-04-16 | 1 | UCD | DT |
| K. Barton | m | 1980-03-01 | 1981-05-02 | 3 | QUB | 1500m, XC |
| N. Barton | m | 1980-03-01 | 1983-03-12 | 3 | QUB | XC |
| R. Barton | m | 1976-04-30 | 1976-05-01 | 1 | RCSI | 200m |
| Charlie Bastow | m | 2023-01-28 | 2024-04-06 | 6 | UCD | 4x100m, 4x200m, 4x400m |
| Damian Bateman | m | 2000-11-12 | 2001-04-21 | 4 | DIT | 800m, Road, XC |
| Aengus Bates | m | 2010-03-13 | 2011-03-12 | 3 | UG | Road, XC |
| David Battie | m | 2003-11-22 | 2004-02-28 | 5 | TCD | 400m, 60m, Road, XC |
| John Battisteli | m | 2014-02-22 | 2014-03-08 | 2 | UCD | XC |
| Jamie Battle | m | 2018-11-17 | 2022-11-11 | 13 | DCU | 1500m, 3000m, 4x1000m, 5000m, Road, XC |
| John Battles | m | 1983-05-06 | 1984-05-05 | 4 | NIHEL | HJ, LJ, TJ |
| Ethan Baudry | m | 2022-03-05 | 2022-03-05 | 1 | AIT | XC |
| Peter Baul | m | 2022-11-11 | 2022-11-11 | 1 | UCC | Road |
| Berot Bavorset | m | 1993-02-12 | 1993-02-12 | 2 | UL | 1500m, 800m |
| Neil Baxter | m | 1999-06-22 | 1999-06-22 | 1 | NI U23 | 400m |
| Lance Baylon | m | 2020-02-15 | 2020-02-15 | 2 | UU | LJ, TJ |
| J. Beaney | m | 1969-07-12 | 1969-07-12 | 1 | Edinburgh | DT |
| Eoghan Beary | m | 2018-05-26 | 2018-05-26 | 1 | Ireland | 5000m |
| Eoin Beary | m | 2017-11-18 | 2020-03-07 | 10 | UL | 10000m, 3000m, 5000m, Road, XC |
| Kevin Beashel | m | 1993-02-12 | 1993-02-12 | 2 | UCG | 200m, 60m |
| C. Beattie | m | 1973-03-10 | 1975-03-08 | 2 | QUB | XC |
| Clive Beattie | m | 1977-05-06 | 1981-05-02 | 16 | IUAA, QUB | 100m, 110mH, 200m, 400m, 400mH |
| D. Beattie | m | 1983-05-06 | 1983-05-07 | 2 | QUB | 200m |
| Joseph Beattie | m | 2005-11-19 | 2006-11-18 | 3 | QUB | 10000m, Road |
| Paul Beattie | m | 1973-05-11 | 1976-05-01 | 8 | QUB | 110mH, 400mH |
| Philip Beattie | m | 1984-05-04 | 1986-05-03 | 6 | QUB | 400m, 400mH, 4x100m, 4x400m |
| Steven Beattie | m | 2016-05-28 | 2016-05-28 | 2 | SUCA | 100m, 4x100m |
| Patrick Beausang | m | 1992-03-07 | 1992-03-07 | 1 | UCC | XC |
| Stephen Becker | m | 2000-06-20 | 2000-06-20 | 2 | GST, SU | LJ, TJ |
| A.J. Beckett | m | 1938-05-26 | 1939-05-27 | 7 | UCC | 120yH, 440y, 880y |
| D. Beckett | m | 1981-03-07 | 1983-03-12 | 3 | UCC | XC |
| Jerry Beckett | m | 1970-05-09 | 1974-05-04 | 6 | UCC | 400m, 4x100m, LJ |
| Jerry Beckett | m | 1973-05-11 | 1973-05-12 | 1 | UCG | 400m |
| Graham Bee | m | 2003-03-22 | 2007-03-31 | 2 | SU | XC |
| John Beehan | m | 2006-11-18 | 2009-03-07 | 2 | UL | Road, XC |
| David Beere | m | 1999-12-03 | 2000-12-02 | 7 | NUIM | 100m, 200m, 60m, Road |
| A. Beggs | m | 1979-05-04 | 1979-05-05 | 2 | QUB | 110mH, TJ |
| B. Begley | m | 1966-03-28 | 1966-03-28 | 1 | NACA | 880y |
| Dylan Behan | m | 2013-02-01 | 2014-04-12 | 4 | ITB | 35lbWfD, 60m, JT |
| Keith Behan | m | 1991-03-02 | 1994-02-19 | 3 | NUIM, SPM | XC |
| Matthew Behan | m | 2016-02-12 | 2019-04-06 | 25 | DCU, IUAA | 110mH, 4x100m, 4x200m, 4x400m, 60mH |
| Matthew Behan | m | 2022-04-08 | 2022-04-09 | 3 | TCD | 110mH, 4x100m |
| B. Beirne | m | 1952-05-22 | 1952-05-22 | 1 | UCD | PV |
| Mick Beirne | m | 1966-11-26 | 1970-03-14 | 6 | UCD | 3 Miles, XC |
| Rory Beirne | m | 2005-04-22 | 2005-12-11 | 3 | UCD | HJ, LJ |
| Gary Bekkingham | m | 1998-06-23 | 1998-06-23 | 1 | NI U23 | HT |
| James T. Belcher | m | 1873-05-19 | 1873-05-19 | 3 | UCC | 100y, 440y, 880y |
| Alan Bell | m | 1970-03-14 | 1970-05-09 | 2 | QUB | 5000m, XC |
| Andrew Bell | m | 2017-04-07 | 2017-04-08 | 1 | DCU | 3000mW |
| Corporal J. Bell | m | 1933-07-10 | 1933-07-10 | 1 | The Rest | Mile |
| David Bell | m | 2014-11-15 | 2014-11-15 | 1 | UL | Road |
| E. Bell | m | 1988-03-05 | 1988-03-05 | 1 | SPM | XC |
| Jonny Bell | m | 2024-02-10 | 2024-04-06 | 4 | TCD | 35lbWfD, DT, SP |
| Matt Bell | m | 2001-06-19 | 2001-06-19 | 1 | SU | 1500m |
| Benoit Benault | m | 1993-03-06 | 1993-03-06 | 1 | UL | XC |
| Axel Benditksy | m | 2001-04-20 | 2002-04-20 | 3 | RCSI | 4x100m, HJ, LJ |
| Adam Bennett | m | 2015-11-14 | 2017-03-04 | 3 | QUB | Road, XC |
| Mike Bennett | m | 1995-03-11 | 1995-06-20 | 2 | SU | 800m |
| Robert Bennett | m | 2012-04-20 | 2016-05-28 | 36 | CIT, IUAA | 100m, 200m, 4x100m, 4x200m, 4x400m, 60m, Road |
| Tom Benoist | m | 2019-03-02 | 2019-04-06 | 3 | CIT | 400mH, 5000m, XC |
| Alistair Benson | m | 2006-12-02 | 2009-02-15 | 13 | UU | 35lbWfD, DT, HT, JT, SP |
| P. Benson | m | 1977-03-12 | 1977-03-12 | 1 | UCG | XC |
| Stefano Benveduti | m | 2019-02-08 | 2019-02-08 | 3 | AIT | 200m, 4x200m |
| Stefano Benveduti Marini | m | 2017-02-10 | 2017-04-08 | 4 | AIT | 400mH, 4x200m, 4x400m |
| T. Berger | m | 1990-03-03 | 1990-03-03 | 1 | TCD | XC |
| G. Bergin | m | 1959-05-17 | 1959-05-17 | 1 | NACA | DT |
| Niall Bergin | m | 2010-03-13 | 2010-03-13 | 1 | UG | XC |
| Steve Bergin | m | 1986-05-02 | 1991-05-04 | 9 | QUB | DT, HT, SP |
| Chris Berkeley | m | 1977-06-14 | 1977-06-14 | 1 | BLE Select | PV |
| Stephen Joseph Berkeley | m | 1979-05-04 | 1982-05-12 | 15 | TCD | 110mH, 400mH, HJ |
| Conor Bermingham | m | 2015-02-06 | 2019-05-25 | 10 | Ireland, IUAA, TCD | PV, SP |
| Conor Bermingham | m | 2019-04-05 | 2019-04-06 | 1 | TCD | PV |
| Daire Bermingham | m | 2011-03-12 | 2012-04-21 | 8 | DIT | 1500m, 4x400m, Road, XC |
| Patrick J. Bermingham | m | 1933-07-10 | 1933-07-10 | 1 | The Rest | DT |
| Adam Berry | m | 2024-10-19 | 2024-11-08 | 2 | MU | Road, XC |
| Nick Berry | m | 1996-02-09 | 1996-02-10 | 1 | GST | 400m |
| Fabien Bertic | m | 2001-12-07 | 2001-12-08 | 2 | DCU | 1500m |
| Fabier Bertic | m | 2001-11-07 | 2001-11-07 | 1 | GST | Road |
| William Bertrac | m | 2006-12-02 | 2007-04-14 | 5 | IT Carlow | 100m, 200m, 400m, 60m |
| Mark Bevan | m | 1998-12-11 | 1998-12-12 | 1 | GST | 3000m |
| G. Beveridge | m | 1995-03-11 | 1995-03-11 | 1 | SU | TJ |
| Mark Bevin | m | 1998-12-11 | 2002-11-16 | 8 | UCC | 2000mW, Road, XC |
| Jamey Bianchi | m | 1995-06-17 | 1995-06-20 | 2 | GST, H & Y | 2000mSC, 5000m |
| John Biddle | m | 2007-02-24 | 2007-02-24 | 1 | UCD | XC |
| Gabriel Bietz | m | 2002-04-19 | 2002-04-20 | 2 | RCSI | 110mH, HT |
| Robert D Billet | m | 1978-06-30 | 1978-06-30 | 1 | Cornell-Pennsylvania | DT |
| Ben Bingham | m | 2010-02-13 | 2010-02-13 | 3 | UU | 200m, 60m |
| Davide Biral | m | 2018-11-17 | 2018-11-17 | 1 | UCD | Road |
| Edward N.B. Birch | m | 1913-05-24 | 1913-05-24 | 1 | TCD | 880y |
| T. Bird | m | 1951-03-03 | 1951-03-03 | 1 | English Unis | XC |
| Micheál Birmingham | m | 2009-04-24 | 2009-04-25 | 2 | UL | 35lbWfD, SP |
| Krystof Bittman | m | 2024-10-19 | 2024-10-19 | 1 | TUD | XC |
| Jaroslaw Blacharski | m | 2015-11-14 | 2018-11-17 | 6 | UCD | Road, XC |
| Aaron Black | m | 1992-04-24 | 1993-03-06 | 2 | QUB | 5000m, XC |
| Aran Black | m | 1992-03-07 | 1995-03-04 | 4 | QUB | Road, XC |
| David Black | m | 1977-06-14 | 1977-06-14 | 1 | England | 3000m |
| Matt Black | m | 2009-04-24 | 2009-04-25 | 3 | TCD | 100m, 4x100m |
| R. Black | m | 1972-03-04 | 1972-03-04 | 1 | QUB | XC |
| Aaron Blackbourne | m | 1988-04-29 | 1990-04-28 | 9 | QUB | 110mH, DT, HJ, HT, JT, SP |
| D. Blackbourne | m | 1988-04-29 | 1988-04-30 | 1 | QUB | JT |
| Sean Blackburn | m | 2021-11-13 | 2022-11-11 | 2 | UCC | Road |
| Mark Blackwell | m | 2022-11-11 | 2024-04-06 | 5 | UL | 1500m, Road, XC |
| Niall Blackwell | m | 2019-02-08 | 2019-02-08 | 2 | UL | 1500m |
| Darryl Blair | m | 2011-03-12 | 2011-03-12 | 1 | UU | XC |
| Jason Blair | m | 2000-04-14 | 2000-04-15 | 1 | RCSI | 5000m |
| Gabe Blake | m | 2024-11-08 | 2024-11-08 | 1 | QUB | Road |
| Stephen E.F. "Steve" Blake-Knox | m | 1969-05-03 | 1970-05-13 | 6 | TCD | 100m, 100y, 4x100m, 4x110y |
| Alastair Blamire | m | 1969-07-12 | 1969-07-12 | 2 | Edinburgh | 3 Miles, Mile |
| Joseph Blanchard | m | 2023-11-10 | 2023-11-10 | 1 | DCU | Road |
| Nicholas Bland | m | 2010-11-13 | 2012-11-17 | 7 | TCD | 1500m, Road, XC |
| Paul Blany | m | 2003-03-22 | 2003-03-22 | 1 | NI U23 | XC |
| Donnacha Blean | m | 1992-03-07 | 1992-03-07 | 1 | NUIM | XC |
| ?. Blom | m | 1974-05-03 | 1974-05-04 | 1 | RCSI | JTo |
| Martin Blömker | m | 2011-11-12 | 2011-11-12 | 1 | UL | Road |
| Alan Bloomer | m | 1997-12-12 | 1999-04-24 | 10 | Carlow RTC, IT Carlow | 400m, 4x100m |
| Justin Bloomer | m | 2016-02-12 | 2020-02-15 | 19 | UU | 1500m, 200m, 400m, 4x100m, 4x200m, 800m, Road |
| Ronan Bloomer | m | 2017-04-07 | 2023-04-22 | 35 | QUB, UU | 100m, 110mH, 200m, 35lbWfD, 400m, 4x100m, 4x200m, 4x400m, 60m, CE, HJ, LJ, SP |
| A. Bluett | m | 1988-04-29 | 1988-04-30 | 1 | UCD | TJ |
| Adam Bluett | m | 2013-02-01 | 2013-04-13 | 3 | UCC | 400m, 4x400m |
| S. Blyth | m | 1971-05-22 | 1971-05-22 | 1 | SU | JTo |
| G. Boak | m | 1951-03-03 | 1951-03-03 | 1 | English Unis | XC |
| D. Boal | m | 1977-03-12 | 1977-03-12 | 1 | QUB | XC |
| Ken Boddie | m | 1978-06-30 | 1978-06-30 | 1 | Cornell-Pennsylvania | LJ |
| Richard G.V. Boelens | m | 1963-05-11 | 1968-05-01 | 20 | IUAA, TCD | 100y, 4x110y, LJ, TJ |
| Edward Bogdanovich | m | 1978-06-30 | 1978-06-30 | 1 | Cornell-Pennsylvania | SP |
| Alan Bogle | m | 2005-11-19 | 2005-11-19 | 1 | UU | Road |
| Gerard Bogle | m | 1996-02-09 | 1996-04-20 | 3 | UU | 1500m |
| Stephen Bogle | m | 2003-04-25 | 2003-04-26 | 3 | IT Tallaght | 100m, 200m, 4x400m |
| Conor Bohan | m | 2000-12-01 | 2000-12-02 | 1 | DCU | SP |
| M. Bohan | m | 1984-05-04 | 1984-05-05 | 1 | UCD | HT |
| M. Bohan | m | 1988-04-29 | 1988-04-30 | 2 | ILSI | DT, HT |
| Kevin Bohane | m | 2004-11-20 | 2004-11-20 | 1 | UCC | Road |
| Robert Boland | m | 2001-12-07 | 2001-12-08 | 3 | IT Tralee | 200m, 400m, 4x200m |
| Nils Bolander | m | 1999-03-06 | 1999-04-24 | 3 | UCD | 10000m, 5000m, XC |
| Colin Bolger | m | 2007-11-17 | 2010-03-13 | 4 | DIT | Road, XC |
| Conor Bolger | m | 1998-04-24 | 1998-04-25 | 1 | WIT | 800m |
| John Bolger | m | 1974-12-06 | 1977-05-17 | 10 | UCD | 10000m, 1500m, 5000m, XC |
| M. Bolger | m | 1964-05-30 | 1965-06-23 | 2 | AAUE | 440y |
| Nathan Bolger | m | 2019-11-16 | 2019-11-16 | 1 | UL | Road |
| Neil Bolger | m | 2010-03-13 | 2011-03-12 | 2 | DIT | XC |
| Sean Bolger | m | 2009-04-24 | 2010-02-13 | 3 | IT Tallaght | 400m |
| Stephen Bolger | m | 2000-12-01 | 2000-12-02 | 1 | IT Carlow | 200m |
| Andrew Bolster | m | 2014-04-11 | 2015-04-11 | 4 | UU | 3000mW, 400mH, HT |
| James Bolton | m | 2023-11-10 | 2023-11-10 | 1 | TCD | Road |
| Andrea Bonano | m | 2019-11-16 | 2019-11-16 | 1 | IT Carlow | Road |
| Chris Bonus | m | 2008-03-08 | 2008-03-08 | 1 | GST | XC |
| Stijn Boon | m | 2006-11-18 | 2006-11-18 | 1 | QUB | Road |
| Connor Booth | m | 2024-02-10 | 2024-02-10 | 3 | TUS | 4x200m, 60m |
| David Booth | m | 1970-05-09 | 1973-05-16 | 13 | IUAA, UCD | 110mH, 120yH, HJ, PV |
| J. Booth | m | 1982-03-06 | 1982-03-06 | 1 | NUU | XC |
| Michael J. Boothroy | m | 1967-11-25 | 1967-11-25 | 1 | TCD | XC |
| Michael John "Mike" Boothroyd | m | 1964-05-20 | 1965-11-20 | 2 | TCD | Mile, XC |
| Lawrence Boran | m | 2013-02-01 | 2015-04-11 | 11 | IT Tallaght | 1500m, 800m |
| Colin Boreham | m | 1977-06-14 | 1979-05-05 | 3 | Birmingham, QUB | 110mH, HJ, JTo |
| Colin Boreman | m | 1979-05-04 | 1979-05-05 | 1 | QUB | LJ |
| Ian Howie Borland | m | 1927-06-28 | 1929-07-03 | 5 | Atalanta | 100y, 220y, 440y, 440y, 220yx2, 880y, 880y, 220yx2, 440y |
| Eivind Hegge Borna | m | 1969-05-03 | 1970-05-09 | 6 | RCSI | DT, JTo, SP |
| Fabien Bosc | m | 2008-11-15 | 2009-04-25 | 7 | UL | 200m, 400m, 400mH, 4x200m, Road |
| Joe Bosonnet | m | 2021-11-13 | 2024-03-09 | 5 | TCD | 3000m, Road, XC |
| Adrian Bouchier | m | 1995-12-16 | 1995-12-16 | 1 | Athlone RTC | XC |
| Thomas Bouchier | m | 2011-02-05 | 2014-04-12 | 7 | GST, UCD | 35lbWfD, HT, SP |
| Thomas Bouchier | m | 2020-02-15 | 2020-02-15 | 1 | IT Carlow | 35lbWfD |
| Christoff Bouffioux | m | 2000-04-14 | 2000-04-15 | 2 | TCD | PV, TJ |
| Zac Boukelia | m | 2008-03-28 | 2008-03-28 | 1 | SU | XC |
| Tom Bouman | m | 1999-11-13 | 2000-02-26 | 3 | TCD | Road, XC |
| Aurelein Bourgeon | m | 2013-02-01 | 2013-04-13 | 4 | IT Carlow | 10000m, 3000m, 5000m |
| Brendan Bourke | m | 1998-12-11 | 2010-02-13 | 65 | GST, IUAA, UL | 100m, 110mH, 200m, 35lbWfD, 4x100m, 4x200m, 60m, 60mH, CE, DT, HJ, HT, JT, LJ, PV, SP, TJ |
| Colm Bourke | m | 2015-02-06 | 2016-04-16 | 4 | DCU | LJ |
| J. Bourke | m | 1939-05-27 | 1939-05-27 | 1 | UCD | 880y |
| James Bourke | m | 2024-02-10 | 2024-11-08 | 5 | UG | 800m, PV, Road, XC |
| John Bourke | m | 2013-11-23 | 2013-11-23 | 1 | DCU | Road |
| Keith Bourke | m | 2002-11-16 | 2004-11-20 | 12 | CIT | 4x200m, 5000m, 800m, Road, XC |
| Martin Bourke | m | 1998-02-28 | 1998-02-28 | 1 | UL | XC |
| Niall Bourke | m | 2002-11-16 | 2004-02-28 | 3 | UCC | Road, XC |
| Noel Bourke | m | 1973-03-10 | 1973-03-10 | 1 | UCG | XC |
| Sam Bourke | m | 2009-04-24 | 2009-04-25 | 1 | UCC | 400m |
| T.J. Bourke | m | 1995-12-16 | 1995-12-16 | 1 | UCD | XC |
| Thomas Bourke | m | 2022-03-05 | 2022-03-05 | 1 | RCSI | XC |
| John Bourke Neligan | m | 1925-06-06 | 1925-06-06 | 1 | TCD | 120yH |
| Andrew Bove | m | 1993-03-06 | 1993-03-06 | 1 | TCD | XC |
| K. Bowden | m | 1981-05-01 | 1981-05-13 | 2 | TCD | HJ |
| J.J. Bowe | m | 1927-06-04 | 1929-06-01 | 3 | QUB | 440y, 880y, Mile |
| Shane Bowe | m | 2020-02-15 | 2021-11-13 | 2 | WIT | 400m, Road |
| Abbas Bowen | m | 2013-02-01 | 2014-04-12 | 5 | TCD | 100m, 200m, 400m, 60m |
| Anthony Bowen | m | 2015-11-14 | 2017-04-08 | 7 | UL | 10000m, 3000mSC, Road, XC |
| Ger Bowen | m | 1999-03-06 | 1999-03-06 | 1 | CIT | XC |
| Jonathan Bowen | m | 2011-11-12 | 2011-11-12 | 1 | UCD | Road |
| Brendan Bowers | m | 1952-05-22 | 1954-05-22 | 3 | UCD | 440y |
| Darren Bowes | m | 2012-02-04 | 2014-02-07 | 9 | IT Carlow | 200m, LJ, TJ |
| Michael Bowler | m | 2011-02-05 | 2016-04-16 | 58 | DCU, IT Carlow | 4x200m, 60mH, CE, DT, HJ, JT, LJ, PV, SP |
| Tim Bowler | m | 2017-04-07 | 2018-02-09 | 8 | UCD | 60mH, CE, HJ, LJ, SP |
| B. Bowling | m | 1972-03-04 | 1972-03-04 | 1 | UCC | XC |
| M. Bowman | m | 1962-02-17 | 1962-02-17 | 1 | UCD | XC |
| Peter Bowman | m | 2013-06-01 | 2013-06-01 | 1 | GST | 4x400m |
| Peter Bowman | m | 2013-06-01 | 2013-06-01 | 1 | SU | 5000m |
| James Bowness | m | 2014-05-31 | 2014-05-31 | 1 | SUCA | 1500m |
| Brendan Boyce | m | 2005-12-10 | 2007-04-14 | 4 | IT Carlow | 2000mW, 3000mW |
| Brian Boyce | m | 2002-11-16 | 2004-04-17 | 16 | DCU | 100m, 200m, 400m, 4x100m, 4x200m, 4x400m, 60m, LJ, Road, SP |
| David Boyd | m | 2009-02-14 | 2010-04-24 | 10 | UCC | 200m, 4x100m, 4x200m, 60m, JT |
| J.A. Boyd | m | 1928-06-02 | 1929-06-01 | 3 | QUB | 220y, SP |
| L.M. Boyd | m | 1929-07-03 | 1929-07-03 | 2 | Atalanta | HT, SP |
| Michael W.G. "Mike" Boyes | m | 1969-05-15 | 1969-05-15 | 1 | TCD | TJ |
| Jack Boylan | m | 2017-03-04 | 2020-03-07 | 8 | DCU | 10000m, 1500m, Road, XC |
| Patrick Boylan | m | 1999-12-03 | 2004-06-08 | 5 | IT Tallaght, IUAA | 3000m, 3000mSC, Road, XC |
| Patrick Boylan | m | 2002-11-16 | 2005-04-23 | 13 | DCU | 1500m, 3000mSC, 4x100m, 4x400m, Road, XC |
| Adam Boyle | m | 2018-05-26 | 2018-05-26 | 1 | Scotland | JT |
| Andrew Boyle | m | 1998-06-23 | 1998-06-23 | 1 | SU | HT |
| Anthony Boyle | m | 2024-03-09 | 2024-11-08 | 3 | UG | Road, XC |
| Dominic Boyle | m | 2016-11-19 | 2018-11-17 | 8 | TCD | 2000mW, 3000mW, Road, XC |
| E. Boyle | m | 1983-03-12 | 1983-03-12 | 1 | UCG | XC |
| Eamon Boyle | m | 1988-03-05 | 1988-04-30 | 3 | UCG | 10000m, 5000m, XC |
| George Boyle | m | 2007-11-17 | 2012-04-21 | 30 | UCC | 10000m, 12, 4, 8, 16, 1500m, 3000m, 5000m, CE, DT, HJ, HT, LJ, Road, SP, XC |
| John Boyle | m | 1988-03-01 | 1988-03-01 | 1 | TCD | XC |
| M. Boyle | m | 1970-05-09 | 1970-05-09 | 2 | UCC | LJ |
| Simon Boyle | m | 1985-05-03 | 1988-04-30 | 4 | QUB | 110mH, HJ, TJ |
| Tommy Boyle | m | 2002-04-19 | 2004-04-17 | 3 | AIT | JT |
| William Douglas Boyle | m | 1939-07-01 | 1939-07-01 | 1 | IUAA | HJ |
| Chris Bracken | m | 2005-11-19 | 2008-04-19 | 7 | DCU, IUAA | 10000m, Road, XC |
| Christopher Bracken | m | 2008-11-15 | 2008-11-15 | 1 | TCD | Road |
| Conor Bracken Price | m | 2018-02-09 | 2018-04-14 | 7 | AIT | 200m, 4x100m, 4x200m, 4x400m |
| Conor Bracken-Price | m | 2014-02-07 | 2016-02-12 | 15 | IUAA, UCD | 200m, 400m, 4x100m, 4x200m, 4x400m |
| Lionel H. Braddell | m | 1934-05-26 | 1936-05-30 | 6 | TCD | 100y, 120yH |
| Andrew Bradfield | m | 2006-12-02 | 2007-04-14 | 6 | CIT | 35lbWfD, DT, HT, SP |
| Conor Bradley | m | 2005-06-07 | 2005-06-07 | 1 | NI U23 | 1500m |
| Conor Bradley | m | 2011-04-29 | 2012-07-18 | 3 | Derry City, UU | 1500m |
| G. Bradley | m | 1932-05-28 | 1932-05-28 | 1 | QUB | HJ |
| Geoffrey Bradley | m | 1995-03-04 | 1996-11-23 | 3 | TCD | Road, XC |
| George Bradley | m | 1972-05-10 | 1974-05-15 | 5 | UCD | 110mH, PV |
| Gerry Bradley | m | 1972-05-05 | 1974-05-04 | 5 | UCD | 110mH, PV |
| Jonathan Bradley | m | 2014-02-07 | 2014-02-07 | 1 | LYIT | 3000m |
| R. Bradley | m | 1995-03-11 | 1995-03-11 | 2 | Birmingham | LJ, SP |
| Tomas Bradley | m | 2008-11-15 | 2009-11-14 | 3 | UCD | Road, XC |
| U. Bradley | m | 1983-03-12 | 1983-03-12 | 1 | QUB | XC |
| V. Bradley | m | 1983-05-06 | 1983-05-07 | 2 | QUB | 800m |
| W.J. Bradley | m | 1931-05-30 | 1933-05-27 | 3 | QUB | 440y, 880y, Mile |
| Martin Bradshaw | m | 2000-04-14 | 2006-03-04 | 5 | LIT | 10000m, 1500m, 800m, XC |
| Peter Bradshaw | m | 1999-04-23 | 1999-04-24 | 1 | GST | 400m |
| Aidan Brady | m | 2019-05-25 | 2019-05-25 | 2 | Scotland | 400m, 4x400m |
| Brian Brady | m | 2000-04-14 | 2002-04-20 | 4 | AIT, IUAA | DT, JT |
| Chris Brady | m | 1958-05-18 | 1958-05-18 | 1 | NACA | Mile |
| Declan Brady | m | 2018-02-09 | 2018-04-14 | 6 | GMIT | 400m, 4x100m, 4x200m, 800m |
| Eoin Brady | m | 1989-03-04 | 1990-04-28 | 3 | TCE | 5000m, XC |
| Eoin Brady | m | 2007-04-13 | 2007-04-14 | 1 | TCD | 10000m |
| Eoin Brady | m | 2010-04-23 | 2010-04-24 | 1 | UCD | 5000m |
| Eric Brady | m | 1985-05-03 | 2015-04-11 | 108 | DCU, GST, IUAA, UCD | 110mH, 35lbWfD, 400mH, CE, DT, HJ, HT, JT, JTo, LJ, PV, Road, SP, TJ, XC |
| Gerry Brady | m | 1975-03-08 | 1977-05-17 | 6 | UCD | 3000mSC, 5000m, XC |
| J. Brady | m | 1977-03-12 | 1977-03-12 | 1 | UCD | XC |
| Liam Brady | m | 2012-02-04 | 2013-04-13 | 6 | DIT | 3000m, 5000m, Road, XC |
| Liam Brady | m | 2013-11-23 | 2017-03-04 | 16 | AIT | 10000m, 3000m, 5000m, Road, XC |
| Liam Brady | m | 2018-02-09 | 2018-03-10 | 3 | AIT | 3000m, XC |
| Liam Brady | m | 2019-02-08 | 2019-02-08 | 2 | AIT | 3000m |
| Padraig Brady | m | 2013-02-01 | 2013-04-13 | 7 | UCC | 100m, 200m, 4x100m, 4x200m, 60m |
| Patrick Richard Brady | m | 1977-03-12 | 1977-03-12 | 1 | TCD | XC |
| Paul Brady | m | 1975-12-13 | 1977-05-07 | 6 | TCD | 10000m, 5000m, XC |
| Sean Brady | m | 2002-11-16 | 2008-04-19 | 7 | TCD | 10000m, JT, Road, XC |
| James Bragg | m | 1994-06-28 | 1995-06-20 | 3 | SU | 100m, 200m |
| Len Braham | m | 1977-06-14 | 1977-06-14 | 1 | BLE Select | DT |
| Tom Braid | m | 1950-03-18 | 1950-03-18 | 1 | SU | XC |
| David Brand | m | 2014-05-31 | 2015-05-31 | 4 | SUCA | 100m, 200m, 4x100m |
| Stephen Brannon | m | 1995-06-17 | 1995-06-20 | 2 | H & Y | PV |
| R. Branton | m | 1977-03-12 | 1977-03-12 | 1 | QUB | XC |
| Juan Bravo | m | 2010-03-13 | 2010-03-13 | 1 | CIT | XC |
| James Bray | m | 2022-03-05 | 2022-03-05 | 1 | CIT | XC |
| Thomas Bray | m | 2015-05-31 | 2015-05-31 | 2 | SUCA | 200m, 4x400m |
| John Brazil | m | 1982-04-30 | 1985-05-04 | 2 | UCD | 800m |
| Kieron Breagy | m | 2013-02-01 | 2013-11-23 | 3 | DKIT | 3000m, Road |
| Andrew W. Breakey | m | 1932-05-28 | 1933-05-27 | 2 | TCD | 880y |
| Bartley Breathnach | m | 1996-06-25 | 1996-06-25 | 3 | IUAA | DT, JT, SP |
| Colm Breathnach | m | 2017-11-18 | 2017-11-18 | 1 | UCC | Road |
| Eoin Breathnach | m | 2004-04-16 | 2004-04-17 | 1 | WIT | 5000m |
| Cahir Breen | m | 2024-03-09 | 2024-03-09 | 1 | QUB | XC |
| D. Breen | m | 1973-05-11 | 1973-05-12 | 1 | UCD | HT |
| John Breen | m | 1992-04-24 | 1993-05-08 | 3 | UL | 3000mW, 35lbWfD, CE |
| Joseph Breen | m | 2009-02-14 | 2011-11-12 | 7 | UCD | 1500m, Road |
| Mickey Breen | m | 2008-03-28 | 2008-03-28 | 1 | SU | XC |
| Patrick Breen | m | 2003-04-25 | 2003-04-26 | 2 | TCD | 100m, 200m |
| Tomas Breen | m | 2019-02-08 | 2019-02-08 | 1 | IT Carlow | 800m |
| A. Brennan | m | 1976-03-06 | 1979-03-17 | 4 | UCD | XC |
| Aaron Brennan | m | 2019-11-16 | 2024-10-19 | 17 | UG | 10000m, 1500m, 3000m, Road, XC |
| Aaron Brennan | m | 2022-11-11 | 2022-11-11 | 1 | DCU | Road |
| Adam Brennan | m | 2009-02-14 | 2011-02-05 | 13 | WIT | 100m, 200m, 4x100m, 4x200m, 60m, LJ |
| Alex Brennan | m | 1998-12-11 | 2001-04-21 | 12 | IUAA, UL | 110mH, 400m, 400mH, 4x400m, 60mH |
| Andrew Brennan | m | 2009-11-14 | 2010-03-13 | 2 | DCU | Road, XC |
| Andrew G.M. Brennan | m | 1980-03-01 | 1982-03-06 | 3 | TCD | XC |
| Colm Brennan | m | 1991-03-02 | 1991-03-02 | 1 | DIT | XC |
| Colm Brennan | m | 1992-03-07 | 1992-03-07 | 1 | QUB | XC |
| Conor Brennan | m | 2015-11-14 | 2023-03-04 | 5 | TCD | Road, XC |
| Dermot Brennan | m | 2024-11-08 | 2024-11-08 | 1 | UCD | Road |
| Dermot Brennan | m | 2009-11-14 | 2014-03-08 | 8 | DCU | Road, XC |
| Dermott Brennan | m | 2022-11-11 | 2024-04-06 | 7 | GST, UG | 1500m, 5000m, Road, XC |
| Donal Brennan | m | 2012-02-04 | 2012-04-21 | 5 | UL | 100m, 200m, 4x100m, 60m |
| Ian Brennan | m | 2017-04-07 | 2019-04-06 | 7 | DCU, IUAA | LJ, TJ |
| John Brennan | m | 1997-06-24 | 1997-06-24 | 1 | SU | Mile |
| Kevin Brennan | m | 1995-06-20 | 1995-06-20 | 1 | SU | TJ |
| M. Brennan | m | 1951-05-26 | 1951-05-26 | 1 | UCG | LJ |
| Morgan Brennan | m | 2024-04-05 | 2024-04-06 | 1 | TCD | DT |
| Niall Brennan | m | 2017-11-18 | 2017-11-18 | 1 | UCC | Road |
| Nicky Brennan | m | 2001-12-07 | 2002-04-20 | 6 | WIT | 200m, 4x100m, 4x200m, 60m, LJ |
| P. Brennan | m | 1969-05-03 | 1972-05-10 | 10 | UCD | HJ, LJ |
| Paddy Brennan | m | 2011-03-12 | 2011-04-30 | 2 | LYIT | 10000m, XC |
| Patrick Brennan | m | 2008-03-08 | 2010-04-24 | 7 | GMIT, IUAA | 1500m, XC |
| Paul Brennan | m | 1992-04-24 | 1993-02-12 | 3 | UCD | 100m, 200m, 60m |
| Robbert Brennan | m | 2013-02-01 | 2013-02-01 | 1 | UCD | 2000mW |
| Robbie Brennan | m | 2010-02-13 | 2010-02-13 | 2 | UCD | 2000mW, 60m |
| S. Brennan | m | 1989-03-04 | 1989-03-04 | 1 | NIHEL | XC |
| S. Brennan | m | 1977-05-06 | 1977-05-07 | 1 | UCG | 100m |
| Tommy Brennan | m | 1971-02-20 | 1972-05-06 | 3 | UCD | 3000mSC, XC |
| Vincent Brennan | m | 1988-03-05 | 1989-05-06 | 4 | NIHED | 5000m, XC |
| W.B.F. Brennan | m | 1928-06-02 | 1928-06-02 | 1 | QUB | SP |
| Dean Brennen | m | 2006-12-02 | 2007-04-14 | 10 | WIT | 35lbWfD, DT, HJ, JT, LJ, SP, TJ |
| Paul Breslin | m | 2009-02-14 | 2012-02-04 | 6 | UCD | 200m, 400m, 4x200m, 800m |
| Shane Breslin | m | 2023-01-28 | 2024-02-10 | 3 | MU | 35lbWfD, SP |
| Tom Breslin | m | 2024-03-09 | 2024-11-08 | 3 | TCD | Road, XC |
| Vincent Breslin | m | 1984-05-04 | 1985-05-04 | 2 | UCD | LJ |
| Richard Bresnan | m | 2013-11-23 | 2014-03-08 | 2 | WIT | Road, XC |
| P.C. Bresnihan | m | 1931-05-30 | 1932-05-28 | 2 | UCD | HJ |
| Patrick C. Bresnihan | m | 1933-05-27 | 1936-05-30 | 9 | IUAA, UCC, UCD | 120yH, DT, HJ, SP |
| Edward Brett | m | 1993-12-04 | 1997-02-16 | 3 | UCD | XC |
| Eoin Brett | m | 2000-04-14 | 2003-03-09 | 3 | IT Carlow | 1500m, XC |
| Barry Steven Brewster | m | 1951-03-03 | 1951-03-03 | 1 | IUAA | XC |
| Brendan Brice | m | 1990-03-03 | 1992-04-25 | 3 | UCC | 400m, XC |
| P. Briens | m | 1982-03-06 | 1983-03-12 | 2 | QUB | XC |
| Paul Brizzell | m | 1994-06-28 | 1996-06-25 | 5 | NI U20, NI U23 | 100m, 200m |
| Aiden Brock | m | 2019-11-16 | 2019-11-16 | 1 | UG | Road |
| J.S. Broderick | m | 1913-05-24 | 1914-06-06 | 5 | UCC | 100y, 220y |
| Jack Broderick | m | 2016-02-12 | 2016-02-12 | 1 | LIT | 400m |
| Thomas Joseph Broderick | m | 1913-05-24 | 1913-05-24 | 1 | TCD | 56lbWfD |
| Timothy S. Broderick | m | 1921-06-04 | 1921-06-04 | 2 | TCD | 100y |
| Colin Brodie | m | 2001-06-19 | 2001-06-19 | 1 | SU | 200m |
| Seth Brody | m | 1995-06-17 | 1995-06-17 | 1 | GST | PV |
| Darren Broe | m | 2001-12-07 | 2002-04-20 | 6 | CIT | 1500m, 4x100m, 5000m, 800m, XC |
| B. Brohan | m | 1976-05-11 | 1976-05-11 | 2 | UCD | 200m, 4x100m |
| C. Brooke | m | 1995-03-11 | 1995-03-11 | 1 | Birmingham | 1500m |
| H.S. Brooks | m | 1874-05-16 | 1874-05-16 | 3 | UCC | 2 Miles, 880y, Mile |
| Niall Brooks | m | 2012-07-18 | 2012-07-18 | 1 | Sale Harriers ENG | 800m |
| Niall Brooks | m | 2021-11-13 | 2022-03-05 | 2 | QUB | 4x1000m, Road |
| Niall Brophy | m | 1956-05-16 | 1960-05-14 | 7 | IUAA, UCD | 100y, 220y, LJ |
| Patrick Brophy | m | 2023-01-28 | 2023-01-28 | 1 | TUD | 800m |
| V. Brophy | m | 1988-04-29 | 1988-04-30 | 1 | NIHED | 100m |
| William Brosnahan | m | 2002-11-16 | 2002-11-16 | 1 | IT Tralee | Road |
| D. Brosnan | m | 1957-05-18 | 1957-05-18 | 1 | UCD | 220y |
| P. Brosnan | m | 1965-06-22 | 1965-06-23 | 2 | IUAA | 3 Miles |
| Sean Brosnan | m | 1965-03-06 | 1965-05-08 | 2 | UCC | 3 Miles, XC |
| Stephen Brotton | m | 1999-11-13 | 1999-11-13 | 1 | QUB | Road |
| D. Brouder | m | 1988-03-05 | 1988-03-05 | 1 | SPM | XC |
| Callum Brown | m | 2014-05-31 | 2014-05-31 | 3 | SAL Select | 100m, DT, JT |
| Lewis Brown | m | 2017-05-27 | 2017-05-27 | 2 | SUCA | 400m, 4x400m |
| Neil Brown | m | 2000-03-11 | 2000-06-20 | 2 | GST, NI U23 | 3000mSC, XC |
| Nick Brown | m | 1999-04-23 | 1999-04-24 | 3 | QUB | 400m, 4x400m |
| Patrick Brown | m | 2005-11-19 | 2006-03-04 | 2 | UCC | Road, XC |
| S. Brown | m | 1989-05-05 | 1989-05-06 | 1 | NIHEL | 100m |
| Sean Brown | m | 2005-11-19 | 2005-11-19 | 1 | UCC | Road |
| Stuart Brown | m | 2007-04-13 | 2009-04-25 | 8 | UU | 100m, 200m, 4x100m, SP |
| Ben Brown Roche | m | 2019-04-05 | 2019-04-06 | 2 | IT Carlow | JT, LJ |
| Cillian Browne | m | 2015-11-14 | 2015-11-14 | 1 | UCD | Road |
| D. Browne | m | 1964-05-30 | 1964-05-30 | 1 | AAUE | TJ |
| Danny Browne | m | 2020-02-15 | 2020-02-15 | 3 | TCD | 4x200m, 60m |
| Darragh Browne | m | 2016-03-05 | 2017-04-08 | 7 | UL | 3000m, 5000m, Road, XC |
| F. Browne | m | 1965-06-22 | 1965-06-22 | 1 | NACA | 3 Miles |
| J. Browne | m | 1976-04-30 | 1978-05-06 | 5 | QUB | DT, HT, SP |
| James C Browne | m | 1978-06-30 | 1978-06-30 | 2 | Cornell-Pennsylvania | 100m, LJ |
| John Browne | m | 2019-02-08 | 2019-02-08 | 1 | UCC | 60m |
| Justin Browne | m | 1999-04-23 | 1999-12-04 | 3 | WIT | 4x200m, 4x400m |
| Michael Browne | m | 1999-11-13 | 1999-12-04 | 2 | UL | 3000m, Road |
| P. Browne | m | 1982-05-12 | 1982-05-12 | 1 | UCD | 100m |
| Patrick Browne | m | 2002-11-16 | 2004-11-20 | 5 | UCC | Road, XC |
| Patrick "Paddy" Browne | m | 1946-07-14 | 1949-05-26 | 7 | UCD | DT, SP |
| Philip Browne | m | 2003-06-10 | 2004-06-08 | 4 | NI U23 | 100m, 110mH, LJ |
| Jonathan Browning | m | 2012-07-18 | 2017-02-10 | 38 | Ballymena & Antrim AC, IUAA, QUB | 100m, 200m, 4x100m, 60m |
| Jack Brownlie | m | 2022-01-29 | 2022-01-29 | 2 | UU | 35lbWfD, SP |
| Calum Bruce | m | 1995-06-20 | 1995-06-20 | 2 | SU | HT, SP |
| Rob Bruce-Brand | m | 1999-11-13 | 2004-04-17 | 30 | TCD | 400m, 4x200m, 4x400m, 800m, Road, XC |
| Leo Brugale | m | 2014-11-15 | 2015-02-06 | 2 | AIT | 800m, Road |
| Diego Brule | m | 2020-02-15 | 2020-02-15 | 1 | UG | 400m |
| B. Bruman | m | 1976-04-30 | 1976-05-01 | 1 | UCD | HJ |
| Ben Brunton | m | 2019-11-16 | 2019-11-16 | 1 | MU | Road |
| Nigel Brunton | m | 1992-03-07 | 2000-02-26 | 27 | GST, IUAA, UCD | 10000m, 1500m, 3000m, 5000m, Road, XC |
| Philip Brunton | m | 1998-02-28 | 1998-02-28 | 1 | DCU | XC |
| John Bruton | m | 2003-11-22 | 2004-04-17 | 3 | TCD | 100m, 400m, Road |
| Michael Bruton | m | 2015-03-07 | 2016-03-05 | 3 | CIT | Road, XC |
| Cecil William Bryan | m | 1964-05-20 | 1966-11-12 | 4 | TCD | 3 Miles, XC |
| Robin Clow Bryson | m | 1980-12-06 | 1989-03-04 | 18 | QUB, TCD | 10000m, 1500m, 5000m, XC |
| G. Buchanan | m | 1927-06-04 | 1927-06-04 | 1 | QUB | Mile |
| J.N. Buchanan | m | 1923-06-02 | 1924-05-31 | 3 | QUB | 880y, Mile |
| Eze Buchi | m | 2019-02-08 | 2019-02-08 | 1 | UCC | 200m |
| Joseph Buckely | m | 2022-03-05 | 2022-03-05 | 1 | UCC | XC |
| A. Buckley | m | 1982-03-06 | 1982-03-06 | 1 | UCC | XC |
| Adam Buckley | m | 2017-04-07 | 2017-04-08 | 2 | CIT | 100m, 200m |
| Bertie Buckley | m | 2012-03-10 | 2012-03-10 | 1 | CIT | XC |
| Brendan Buckley | m | 1989-03-04 | 1989-03-04 | 1 | UCC | XC |
| Brendan Buckley | m | 1994-02-19 | 1994-02-19 | 1 | UCC | XC |
| C. Buckley | m | 1921-06-04 | 1921-06-04 | 1 | UCD | 880y |
| Daniel Buckley | m | 2023-11-10 | 2024-11-08 | 10 | MTU | 1500m, 4x400m, Road, XC |
| Denis Buckley | m | 1964-05-31 | 1967-05-27 | 2 | Army, NACA | 880y |
| J. Buckley | m | 1925-06-06 | 1928-06-02 | 11 | UCC, UCD | 100y, 220y, HJ, LJ |
| Jack Buckley | m | 2019-02-08 | 2019-02-08 | 3 | CIT | 200m, 4x200m |
| James Buckley | m | 2012-04-20 | 2013-04-13 | 3 | TCD | JT, PV |
| Jamie Buckley | m | 2015-02-06 | 2015-11-14 | 6 | UL | 3000m, 3000mSC, 5000m, Road, XC |
| John Buckley | m | 1967-05-27 | 1967-05-27 | 1 | Army | 3 Miles |
| Mark Buckley | m | 2016-11-19 | 2018-11-17 | 4 | UCD | Road, XC |
| Oran Buckley | m | 2021-11-13 | 2022-04-09 | 3 | AIT | 10000m, Road, XC |
| Oran Buckley | m | 2023-11-10 | 2023-11-10 | 1 | TUS | Road |
| Pte R. Buckley | m | 1967-05-27 | 1967-05-27 | 1 | Army | 3 Miles |
| Richard "Dick" Buckley | m | 1950-05-17 | 1952-05-22 | 3 | UCC | 440y, 880y |
| Robert "Bobby" Buckley | m | 1970-03-14 | 1971-02-20 | 3 | SPM | 5000m, XC |
| Stephen Buckley | m | 2008-11-15 | 2008-11-15 | 1 | NUIM | Road |
| James Budde | m | 1999-06-22 | 2003-06-10 | 3 | NI U23 | 3000mSC, 5000m |
| John Budde | m | 2023-11-10 | 2023-11-10 | 1 | UCC | Road |
| Rob Bugden | m | 2007-03-31 | 2007-03-31 | 1 | Welsh Universities | XC |
| Johan Bugeja | m | 2021-11-13 | 2024-11-08 | 8 | MU | 800m, Road, XC |
| Christopher Buggy | m | 2013-02-01 | 2013-04-13 | 2 | IT Carlow | 400m |
| Eoghan Buggy | m | 2015-04-10 | 2019-04-06 | 20 | DCU | 100m, 200m, 400m, 4x200m, 4x400m |
| Raymond Buist | m | 1997-06-24 | 1997-06-24 | 1 | SU | 3000mSC |
| Michael "Mick" Bull | m | 1974-05-03 | 1974-05-04 | 5 | QUB | DT, HJ, LJ, PV, SP |
| Michael "Mike" A. Bull | m | 1969-05-03 | 1969-05-03 | 3 | QUB | DT, LJ, SP |
| Mike Bull | m | 1978-06-30 | 1978-06-30 | 1 | IUAA | PV |
| Simon Bull | m | 2003-11-22 | 2003-11-22 | 1 | TCD | Road |
| Maxime Buquet | m | 2024-02-10 | 2024-02-10 | 2 | UCD | 3000m |
| Luke Burfield | m | 2023-11-10 | 2024-11-08 | 2 | UCC | Road |
| Richard Henry Burgess | m | 1978-05-05 | 1980-05-03 | 7 | TCD | DT, HT |
| Aengus Burke | m | 2014-03-08 | 2017-03-04 | 4 | AIT | XC |
| Aidan Burke | m | 2024-02-10 | 2024-11-08 | 5 | MTU | 1500m, Road, XC |
| Antoine Burke | m | 1994-01-21 | 1998-12-12 | 31 | GST, IUAA, UCD, UL | 110mH, 400m, 4x100m, 4x200m, 4x400m, 60m, 60mH, HJ, LJ, TJ |
| Brian Burke | m | 1988-03-05 | 1990-03-03 | 3 | UCG | XC |
| Christopher Burke | m | 2010-04-23 | 2011-02-05 | 7 | WIT | 200m, 400m, 4x100m, 4x200m, 60m, SP |
| Conor Burke | m | 2010-11-13 | 2010-11-13 | 1 | UCD | Road |
| D Burke | m | 2003-11-22 | 2003-11-22 | 1 | UCD | Road |
| Darren Burke | m | 2003-02-15 | 2005-02-26 | 7 | UCD | 3000m, Road, XC |
| David Burke | m | 1995-12-16 | 1997-02-01 | 5 | GST, Waterford RTC, WIT | 400m, 4x200m, 800m, XC |
| David Burke | m | 2000-02-26 | 2000-04-15 | 2 | UG | 400m, XC |
| David Burke | m | 1997-12-12 | 1997-12-13 | 3 | UG | 200m, 400m |
| Gary Burke | m | 1997-12-12 | 1997-12-13 | 1 | Carlow RTC | 2000mW |
| J. Burke | m | 1966-05-07 | 1967-05-05 | 3 | UCG | LJ, TJ |
| J.J. Burke | m | 1930-06-07 | 1930-06-07 | 2 | UCC | 880y, Mile |
| John Burke | m | 1990-03-03 | 1992-04-25 | 4 | UCD | 1500m, 5000m, XC |
| Kevin Burke | m | 1999-12-03 | 2005-12-11 | 101 | GST, IUAA, UCD, UL | 100m, 110mH, 200m, 35lbWfD, 4x100m, 4x200m, 60m, 60mH, CE, DT, HJ, HT, JT, LJ, PV, SP, TJ |
| Martin Burke | m | 1997-12-12 | 1997-12-13 | 1 | UL | 1500m |
| Naoise Burke | m | 2022-01-29 | 2022-01-29 | 2 | GMIT | 3000m |
| Niall Burke | m | 2001-04-20 | 2001-04-21 | 1 | UCC | 1500m |
| Rory Burke | m | 2017-02-18 | 2019-04-06 | 8 | TCD | 10000m, Road, XC |
| Rory Burke | m | 2019-11-16 | 2022-03-05 | 3 | UCD | Road, XC |
| Rory Burke | m | 2023-04-21 | 2023-04-22 | 1 | UCD | 3000mSC |
| S. Burke | m | 1983-05-06 | 1983-05-07 | 2 | NIHEL | HT, SP |
| Sean Burke | m | 2011-03-12 | 2012-03-10 | 3 | WIT | Road, XC |
| Tomás Burke | m | 2001-12-07 | 2007-04-14 | 31 | IUAA, UL | 110mH, 60mH, CE, HJ, LJ, SP, TJ |
| William Burke | m | 2004-12-03 | 2005-12-11 | 10 | TCD | 100m, 200m, 4x100m, 4x200m, 60m |
| Eoin Burke-Kennedy | m | 1989-03-04 | 1992-04-25 | 5 | UCD | 800m, XC |
| JP Burklow | m | 2019-11-16 | 2020-03-07 | 2 | UCC | Road, XC |
| H. Burnett | m | 1969-07-12 | 1969-07-12 | 1 | Edinburgh | JTo |
| J. Burnett | m | 1969-07-12 | 1969-07-12 | 1 | Edinburgh | JTo |
| David Burns | m | 2012-03-10 | 2012-03-10 | 1 | TCD | XC |
| Donal Burns | m | 1994-04-22 | 1994-04-23 | 2 | QUB | HJ, TJ |
| Gregg Burns | m | 2000-04-14 | 2000-04-15 | 1 | UG | 200m |
| Kevin Burns | m | 2024-03-09 | 2024-11-08 | 5 | SETU | 1500m, Mixed 4x400m, Road, XC |
| Michael Burslem | m | 2000-06-20 | 2002-06-18 | 4 | SU | 100m, 200m |
| Mark Burton | m | 2017-02-10 | 2020-02-15 | 7 | Ireland, QUB | TJ |
| Colin Butler | m | 2005-11-19 | 2009-04-25 | 13 | UL | 12, 4, 8, 16, 1500m, 3000m, 3000mSC, 400mH, 800m, Road, XC |
| Conor Butler | m | 2017-11-18 | 2018-04-14 | 4 | IT Carlow | 3000mSC, 5000m, 800m, Road |
| David Butler | m | 2013-11-23 | 2013-11-23 | 1 | CIT | Road |
| Eoin Butler | m | 2021-11-13 | 2021-11-13 | 1 | RCSI | Road |
| Ger Butler | m | 2010-03-13 | 2011-03-12 | 2 | IT Tallaght | XC |
| Jack Butler | m | 2011-11-12 | 2011-11-12 | 1 | UCC | Road |
| P. Butler | m | 1982-03-06 | 1982-03-06 | 1 | NUU | XC |
| Paul Butler | m | 2017-03-04 | 2018-04-14 | 5 | TCD | 10000m, 5000m, Road, XC |
| Paul Butler | m | 1995-12-16 | 1997-02-01 | 4 | GST, Waterford RTC, WIT | 1500m, LJ, XC |
| Paul Butler | m | 1998-04-24 | 2005-04-23 | 5 | WIT | 10000m, 3000mW, PV |
| Paul Butler | m | 2001-12-07 | 2006-04-22 | 5 | WIT | LJ, PV |
| R. Butler | m | 1977-03-12 | 1980-03-01 | 3 | QUB | XC |
| Robert Butler | m | 2001-04-20 | 2004-04-17 | 3 | WIT | DT, JT |
| Andrew Butterfield | m | 1990-03-03 | 1990-03-03 | 1 | TCD | XC |
| Christopher John Butterworth | m | 1964-05-20 | 1967-06-01 | 15 | IUAA, TCD | DT, JT, JTo, SP |
| Gareth Buttimer | m | 1993-03-06 | 1995-03-04 | 2 | UCC | XC |
| Garett Buttimer | m | 1994-04-22 | 1994-04-23 | 1 | UCG | LJ |
| Fionn Buttner | m | 2013-04-12 | 2019-11-16 | 18 | IUAA, UCD | 1500m, 3000m, 4x400m, 800m, Road, XC |
| Mark Byrd | m | 2021-11-13 | 2021-11-13 | 1 | TCD | Road |
| Adam Byrne | m | 2012-11-17 | 2012-11-17 | 1 | UG | Road |
| Adam Byrne | m | 2021-11-13 | 2022-04-09 | 2 | AIT | 3000mSC, Road |
| Adam Byrne | m | 2023-11-10 | 2024-04-06 | 9 | TUS | 2000mW, 3000mSC, 800m, CE, HJ, LJ, Road, SP |
| Alan Byrne | m | 2002-04-19 | 2003-03-09 | 2 | IT Carlow | 3000mSC, XC |
| Aonghus Byrne | m | 1997-12-12 | 1998-12-12 | 3 | DCU | 1500m, 800m |
| B. Byrne | m | 1969-05-03 | 1969-05-03 | 1 | UCC | 440y |
| Benny Byrne | m | 2000-04-14 | 2000-04-15 | 1 | IT Carlow | 3000mW |
| Brendan Byrne | m | 1998-04-24 | 1998-04-25 | 1 | IT Carlow | 3000mW |
| Brian Byrne | m | 1999-03-06 | 2002-03-09 | 9 | DIT, President's Select | 1500m, 5000m, Road, XC |
| C. Byrne | m | 1988-03-05 | 1989-03-04 | 3 | NIHED | 800m, XC |
| Callan Byrne | m | 2016-02-12 | 2019-04-06 | 30 | IT Carlow, IUAA | 100m, 200m, 4x100m, 4x200m, 4x400m, 60m |
| Cathal Byrne | m | 2015-11-14 | 2016-04-16 | 6 | IT Carlow | 4x400m, LJ, Road, TJ |
| Cathal Byrne | m | 2018-02-09 | 2019-04-06 | 3 | IT Carlow | 400m, 4x400m, LJ |
| Colin Byrne | m | 1997-12-12 | 2000-04-15 | 22 | IUAA, WIT | 110mH, 400m, 400mH, 4x200m, 4x400m, 60mH, HJ |
| Colin Byrne | m | 2002-12-06 | 2004-04-17 | 12 | DCU | 200m, 400m, 400mH, 60mH, HJ, SP, TJ |
| Colm Byrne | m | 1998-06-23 | 1998-06-23 | 1 | IUAA | 110mH |
| D Byrne | m | 1999-04-23 | 1999-04-24 | 1 | DIT | 3000mW |
| D. Byrne | m | 1932-05-28 | 1934-05-26 | 4 | UCD | 220y, 440y |
| Daragh Byrne | m | 1991-03-02 | 1994-02-19 | 6 | DCU | 1500m, 3000mSC, XC |
| David Byrne | m | 2002-11-16 | 2002-11-16 | 1 | IT Tallaght | Road |
| David Byrne | m | 2013-02-01 | 2013-02-01 | 1 | DCU | 35lbWfD |
| David Francis Byrne | m | 1975-03-08 | 1975-03-08 | 1 | TCD | XC |
| David Joseph Gabriel Byrne | m | 1969-05-03 | 1975-05-21 | 7 | TCD | 3 Miles, PV, XC |
| Dean Byrne | m | 2017-02-10 | 2017-02-10 | 1 | UL | 200m |
| Declan Byrne | m | 1995-12-16 | 1999-12-04 | 33 | UL | 110mH, 2000mW, 3000mSC, 3000mW, 60mH, CE, HJ, LJ, PV, SP, TJ, XC |
| Dermot Byrne | m | 1969-11-29 | 1969-11-29 | 1 | UCD | XC |
| Dylan Byrne | m | 2015-11-14 | 2019-04-06 | 17 | GST, QUB | 100m, 200m, 4x100m, 4x200m, 4x400m, Road, XC |
| Eamonn Byrne | m | 2005-12-10 | 2010-04-24 | 26 | DCU | 35lbWfD, DT, HT, JT, SP |
| Evan Byrne | m | 2016-11-19 | 2018-04-14 | 8 | UCC | 10000m, 3000m, Road, XC |
| J. Byrne | m | 1970-03-14 | 1970-03-14 | 1 | UCG | XC |
| J. Byrne | m | 1970-05-09 | 1970-05-09 | 1 | UCG | 800m |
| Jack Byrne | m | 2017-11-18 | 2022-04-09 | 14 | TCD | 4x1000m, 4x400m, 800m, Road |
| Jamie Byrne | m | 2024-11-08 | 2024-11-08 | 1 | UCD | Road |
| Jordan Byrne | m | 2020-03-07 | 2020-03-07 | 1 | DBS | XC |
| Joseph Byrne | m | 1999-06-22 | 2000-06-20 | 2 | NI U23 | 5000m |
| Karl Byrne | m | 1995-06-17 | 1995-06-17 | 1 | GST | 800m |
| Kevin Byrne | m | 1964-05-30 | 1965-06-23 | 2 | AAUE | PV |
| L. Byrne | m | 1979-03-17 | 1979-03-17 | 1 | TCD | XC |
| M. Byrne | m | 1991-03-02 | 1991-03-02 | 1 | DCU | XC |
| Maurice T. Byrne | m | 1952-05-22 | 1958-05-18 | 7 | IUAA, UCD | 880y, Mile |
| Michael Byrne | m | 1999-12-03 | 1999-12-04 | 1 | IT Carlow | 200m |
| N. Byrne | m | 1986-03-08 | 1988-03-05 | 2 | NIHED | XC |
| Niall Byrne | m | 1989-03-04 | 1992-03-07 | 3 | DCU, NIHED | 800m, XC |
| P. Byrne | m | 1939-05-27 | 1939-05-27 | 1 | UCD | 440y |
| P. Byrne | m | 1959-05-17 | 1960-05-15 | 2 | NACA | 440y, 880y |
| P. Byrne | m | 1979-03-17 | 1980-05-14 | 6 | UCD | 1500m, 800m, XC |
| Pat Byrne | m | 2007-04-13 | 2007-04-14 | 2 | UL | 4x400m, 800m |
| Patrick Byrne | m | 2004-12-03 | 2005-04-23 | 6 | UL | 2000mW, 400mH, 4x400m, SP |
| Paul Byrne | m | 2004-12-03 | 2004-12-04 | 2 | IT Tallaght | 1500m, 3000m |
| Paul Byrne | m | 2009-02-14 | 2013-02-01 | 29 | DCU | 110mH, 400m, 400mH, 4x400m, 60mH, CE, HJ, LJ, SP, TJ |
| Paul Byrne | m | 1988-03-01 | 1988-04-30 | 2 | UCD | 200m, XC |
| Paul Byrne | m | 2016-02-12 | 2019-04-06 | 23 | UL | 400m, 400mH, 4x100m, 4x200m, 4x400m, 60mH, HJ |
| Raymond Byrne | m | 2005-11-19 | 2006-03-04 | 2 | DCU | Road, XC |
| Rory Byrne | m | 1992-03-07 | 1994-02-19 | 3 | GST, UCD | 3000mSC, XC |
| Rory Byrne | m | 1998-04-24 | 1998-04-25 | 1 | DCU | 5000m |
| Seamus Joseph Byrne | m | 1963-02-16 | 1965-12-11 | 11 | IUAA, TCD | 3 Miles, Mile, XC |
| Sean Byrne | m | 2019-11-16 | 2021-11-13 | 3 | MU | 200m, Road |
| Sean Byrne | m | 2022-03-05 | 2022-03-05 | 1 | DCU | XC |
| Simon Byrne | m | 2005-12-10 | 2005-12-11 | 2 | UCD | 4x200m |
| T. Byrne | m | 1958-05-18 | 1958-05-18 | 1 | NACA | LJ |
| T. Byrne | m | 1980-03-01 | 1980-03-01 | 1 | SPM | XC |
| T. Byrne | m | 1977-05-06 | 1977-05-07 | 2 | UCC | 100m |
| T. Byrne | m | 1966-03-28 | 1966-03-28 | 1 | NACA | Mile |
| Tom Byrne | m | 1995-06-17 | 1995-06-17 | 1 | GST | 5000m |
| Tomás Byrne | m | 1993-11-27 | 1994-02-19 | 4 | TCD | 3000m, Road, XC |
| Tomas Byrne | m | 2006-04-21 | 2006-04-22 | 1 | CIT | 4x100m |
| Mary Babcock | f | 2022-11-11 | 2023-03-04 | 2 | UCC | Road, XC |
| Lucy Backus | f | 2013-03-09 | 2016-03-05 | 4 | QUB | Road, XC |
| Orna Bacon | f | 1988-04-29 | 1988-04-30 | 2 | UCD | 800m, HJ |
| Shiva Badii | f | 2001-04-20 | 2001-04-21 | 1 | RCSI | 1500mW |
| J. Baggott | f | 1986-03-08 | 1986-03-08 | 1 | NIHEL | XC |
| Katiie Bain | f | 2016-05-28 | 2016-05-28 | 1 | SUCA | 3000m |
| Heather Baird | f | 2017-05-27 | 2017-05-27 | 1 | SUCA | HJ |
| Sarah Baird | f | 2017-02-10 | 2017-02-10 | 1 | ITB | 60m |
| Ciara Baker | f | 2007-11-17 | 2011-03-12 | 8 | TCD | 1500mW, 5000m, JT, Road, XC |
| Elaine Baker | f | 2003-11-22 | 2007-04-14 | 10 | DCU | 1500mW, Road, XC |
| Elaine Baker | f | 2007-12-08 | 2008-04-19 | 2 | TCD | 1500mW |
| Elaine Ball | f | 1993-02-12 | 1993-06-22 | 3 | IUAA, SPM, UL | HJ |
| Sandra Ball | f | 1993-02-12 | 1993-06-22 | 6 | IUAA, UL | 100mH, 400mH, 60mH, CE, HJ |
| Desire Bamisile | f | 2012-07-18 | 2012-07-18 | 1 | Willowfield Harriers | 800m |
| Dorothy Bane | f | 2016-11-19 | 2016-11-19 | 1 | DCU | Road |
| Ella-Cyndy Banjoko-Johnson | f | 2022-01-29 | 2023-01-28 | 5 | UCD | LJ, SP, TJ |
| Stacy Barber | f | 1995-06-17 | 1995-06-20 | 2 | H & Y | HJ |
| Allison Barlow | f | 2007-11-17 | 2008-03-08 | 2 | UCD | Road, XC |
| J. Barnhill | f | 1972-03-04 | 1972-03-04 | 1 | NUU | XC |
| Lizanne Barnwall | f | 2004-11-20 | 2006-11-18 | 2 | DCU | Road |
| Jessie Barr | f | 2008-04-18 | 2012-04-21 | 43 | UL | 100mH, 400m, 400mH, 4x100m, 4x200m, 4x400m, 60mH, CE, HJ, LJ, SP, TJ |
| Kathryn Barr | f | 2018-11-17 | 2022-11-11 | 5 | UCD | Road, XC |
| P. Barr | f | 1985-03-09 | 1986-03-08 | 4 | UU | 1500m, 800m, XC |
| Eva Barret | f | 2009-11-14 | 2009-11-14 | 1 | UL | Road |
| Aimee Barrett | f | 2024-10-19 | 2024-10-19 | 1 | UG | XC |
| Clare Barrett | f | 2021-09-26 | 2024-04-06 | 9 | DCU | 3000m, 3000mSC, Road, XC |
| Lucy Barrett | f | 2019-11-16 | 2023-04-22 | 11 | UCD | 1500m, 5000m, 800m, Road, XC |
| Lucy Barrett | f | 2023-11-10 | 2024-04-06 | 7 | UCD | 3000m, 5000m, Mixed 4x400m, Road |
| Sasha Barrett-Ferris | f | 2022-04-08 | 2022-04-09 | 1 | QUB | JT |
| Mairead Barron | f | 2018-11-17 | 2018-11-17 | 1 | UCD | Road |
| A. Barry | f | 1971-02-20 | 1971-02-20 | 1 | UCG | XC |
| Amy Barry | f | 1965-05-19 | 1967-06-01 | 12 | UCD | 440y, 4x110y, 80mH, 880y, JTo, LJ, XC |
| Ciara Barry | f | 2017-02-10 | 2017-04-08 | 3 | UG | 4x100m, 4x200m |
| Ciara Barry | f | 2018-02-09 | 2019-04-06 | 16 | UG | 100m, 200m, 400mH, 4x100m, 4x200m, 4x400m, 60m |
| Jane Barry | f | 1993-02-12 | 1993-02-12 | 1 | UCD | 200m |
| Jenny Barry | f | 2019-02-08 | 2019-02-08 | 2 | UCC | 200m, 400m |
| Lena Barry | f | 1994-01-21 | 2000-04-15 | 47 | ILSI, IUAA, UL | 100m, 200m, 400m, 4x100m, 4x200m, 60m, HJ |
| M. Barry | f | 1980-03-01 | 1981-03-07 | 2 | UCC | XC |
| Orla Barry | f | 2012-04-20 | 2012-04-21 | 1 | GST | DP |
| Ruth Barry | f | 2008-03-28 | 2008-03-28 | 1 | Welsh Universities | XC |
| Valerie Barry | f | 1996-02-09 | 1996-02-10 | 3 | GST | 400m, 4x200m |
| Anna Bartlett | f | 2009-03-28 | 2009-03-28 | 1 | Wales | XC |
| Aoife Bartley | f | 2011-02-05 | 2014-04-12 | 25 | IUAA, WIT | 100mH, 4x100m, 4x200m, CE, HJ, JT, LJ, SP, TJ |
| S. Barton | f | 1979-03-17 | 1979-03-17 | 1 | SPM | XC |
| Caoimhe Basquille | f | 2012-02-04 | 2014-04-12 | 16 | UCD | 100mH, 200m, 4x100m, 4x200m, 60mH, CE, DT, HJ, LJ, SP, TJ |
| Alannah Bate | f | 2019-11-16 | 2019-11-16 | 1 | UG | Road |
| Sarah Bateson | f | 2021-11-13 | 2024-11-08 | 11 | MU | 1500m, 3000m, Road, XC |
| Cathy Bauman | f | 1998-04-24 | 1998-04-25 | 1 | UCD | 1500mW |
| Anna Verges Bausili | f | 2001-11-07 | 2001-11-07 | 1 | UL | Road |
| Rebecca Bawden | f | 2021-11-13 | 2022-11-11 | 2 | MU | Road |
| C. Beaslin | f | 1982-04-30 | 1982-05-01 | 2 | TCE | 1500m, 3000m |
| Danielle Beattie | f | 2014-05-31 | 2014-05-31 | 1 | SUCA | 1500m |
| Gaelle Beaufay-Herault | f | 2024-04-05 | 2024-04-06 | 3 | SETU | 4x100m, HJ, LJ |
| Snezana Bechtina | f | 2012-02-04 | 2014-02-07 | 10 | DIT, IUAA | 200m, 400m, 4x400m |
| Alison Beck | f | 1996-12-13 | 1999-04-24 | 16 | GST, UCD | 100mH, 60mH, CE, HJ, LJ, PV, SP, TJ |
| Amanda Beckenstein | f | 1997-02-01 | 1997-02-01 | 1 | UCC | XC |
| Sophie Becker | f | 2017-02-10 | 2020-02-15 | 21 | DCU | 200m, 400m, 4x100m, 4x200m, 4x400m |
| Katia Bee | f | 2012-11-17 | 2012-11-17 | 1 | DIT | Road |
| Lorna Begley | f | 2011-03-12 | 2016-04-16 | 6 | IUAA, TCD | 1500m, 800m, Road, XC |
| Rebecca Begley | f | 2022-03-05 | 2022-03-05 | 1 | QUB | 4x1000m |
| Laura Behan | f | 2010-11-13 | 2014-04-12 | 17 | DCU | 1500m, 1500mW, 3000m, Road, XC |
| Holly Belch | f | 2013-06-01 | 2013-06-01 | 3 | SU | 100m, 100mH, 4x100m |
| Emma Bell | f | 2024-10-19 | 2024-10-19 | 1 | UCC | XC |
| L. Bell | f | 1973-05-11 | 1973-05-12 | 1 | NUU | DT |
| Rowena Bell-Scott | f | 2007-03-31 | 2007-03-31 | 1 | SU | XC |
| Mathilde Benazet | f | 2021-11-13 | 2021-11-13 | 1 | UCC | Road |
| J. Bennett | f | 1995-03-11 | 1995-03-11 | 2 | Loughborough | 60m, TJ |
| Melita Bennett | f | 1984-05-04 | 1985-05-04 | 4 | UCG | 100m, 200m |
| Siobhán Bennett | f | 1992-03-07 | 1992-03-07 | 1 | GST | XC |
| Laoise Bennis | f | 2019-02-08 | 2019-02-08 | 4 | UCD | CE, HJ, LJ, SP |
| Deirdre Bentley | f | 1985-05-03 | 1985-05-04 | 1 | UCD | JTo |
| Darleen Berg | f | 2001-04-20 | 2001-04-21 | 2 | UL | JT, SP |
| Claire Bergin | f | 2003-11-22 | 2012-07-18 | 28 | CAI, DCU, DSD | 100m, 200m, 400m, 4x100m, 4x200m, 4x400m, 60m, Road |
| Katie Bergin | f | 2022-01-29 | 2024-04-06 | 14 | IT Carlow, UCC | 100m, 200m, 4x100m, 4x200m, 60m |
| Leah Bergin | f | 2016-02-12 | 2016-04-16 | 4 | ITB | 400m |
| Leah Bergin | f | 2017-02-10 | 2018-02-09 | 3 | ITB | 400m |
| Orla Mary Bergin | f | 1980-05-14 | 1980-05-14 | 1 | TCD | JTo |
| Nicola Berman | f | 2008-04-18 | 2008-04-19 | 1 | RCSI | 4x400m |
| Clementine Bernard | f | 2014-11-15 | 2014-11-15 | 1 | IT Carlow | Road |
| Laura Bernard | f | 2017-02-10 | 2017-02-10 | 1 | UL | HJ |
| Louise Bernard | f | 2007-11-17 | 2012-02-04 | 14 | TCD | 12, 4, 8, 16, 4x100m, 4x200m, 4x400m, 800m, Road |
| Katie Berney | f | 2016-02-12 | 2018-04-14 | 15 | DCU | 100m, 200m, 4x100m, 4x200m, 60m |
| Jenny Berrien | f | 1995-06-17 | 1995-06-20 | 2 | H & Y, Harvard | 100mH |
| M. Berry | f | 1970-03-14 | 1970-03-14 | 1 | UCC | XC |
| Kellie Bester | f | 2022-01-29 | 2023-04-22 | 11 | UL | 100m, 200m, 4x100m, 4x200m, 60m |
| Sophie Betts | f | 1996-06-25 | 1996-06-25 | 2 | SU | LJ, TJ |
| Claire Bibby | f | 2001-06-19 | 2001-06-19 | 1 | SU | 100m |
| Andrea Bickerdike | f | 2008-11-15 | 2014-04-12 | 16 | UCC | 1500m, 400m, 4x100m, 4x200m, 4x400m, 800m, Road, XC |
| Andrea Bickerdike | f | 2015-11-14 | 2017-11-18 | 14 | CIT, IUAA | 1500m, 3000m, 4x200m, 4x400m, 800m, Road |
| Emma Bickerdike | f | 2019-11-16 | 2019-11-16 | 1 | UCC | Road |
| Laura Bickerstaff | f | 2003-06-10 | 2003-06-10 | 1 | NI U23 | 1500m |
| M. Biddy | f | 1984-05-04 | 1984-05-05 | 1 | TCE | 100mH |
| Sylwia Bien | f | 2008-11-15 | 2008-11-15 | 1 | UCD | Road |
| Katie Bird | f | 2006-04-21 | 2006-04-22 | 2 | UCC | 100mH, LJ |
| C. Black | f | 1993-06-22 | 1993-06-22 | 1 | GST | 100m |
| Caroline Black | f | 1993-06-22 | 1993-06-22 | 2 | SU | HJ, LJ |
| C. Blackwood | f | 1995-03-11 | 1995-03-11 | 1 | Loughborough | HJ |
| K. Blackwood | f | 1995-03-11 | 1995-03-11 | 1 | Loughborough | SP |
| Juliette Blanckaert | f | 2003-03-09 | 2003-03-09 | 1 | UCC | XC |
| Marie Blanckaert | f | 2003-03-09 | 2003-03-09 | 1 | UCC | XC |
| Karen Blaney | f | 2013-02-01 | 2018-03-10 | 24 | IUAA, UCD | 200m, 4x100m, 4x200m, LJ, TJ, XC |
| Marie Blaney | f | 2011-11-12 | 2011-11-12 | 1 | RCSI | Road |
| Helen Bleach | f | 1981-03-07 | 1982-03-06 | 2 | UCD | XC |
| Breege Blehein | f | 1994-02-19 | 1994-02-19 | 1 | UCG | XC |
| Breege Blehin | f | 1987-03-07 | 1988-03-05 | 3 | TCE | Road, XC |
| Brid Blehin | f | 1986-03-08 | 1986-03-08 | 1 | TCE | XC |
| B. Blemier | f | 1988-04-29 | 1988-04-30 | 1 | TCE | 1500m |
| Anna Blenner-Hassett | f | 2007-11-17 | 2007-11-17 | 1 | QUB | Road |
| Veronique Bleuman | f | 1994-02-19 | 1994-02-19 | 1 | QUB | XC |
| Amy Blue | f | 2003-03-09 | 2003-03-09 | 1 | NUIM | XC |
| Catherine Blythe | f | 1989-03-04 | 1995-03-04 | 16 | IUAA, UCD | 10000m, 1500m, 3000m, 800m, Road, XC |
| Dania Bogle | f | 2018-02-09 | 2018-02-09 | 1 | IT Tralee | 800m |
| Aine Boland | f | 2013-11-23 | 2013-11-23 | 1 | WIT | Road |
| Charlotte Boland | f | 1999-11-13 | 1999-11-13 | 1 | TCD | Road |
| Deirdre Bolger | f | 1998-02-28 | 2002-04-20 | 3 | UL | 5000m, XC |
| Alice Bolger-Aboud | f | 2020-02-15 | 2020-02-15 | 2 | AIT | 20lbWfD, SP |
| Orla Bollard | f | 2015-11-14 | 2019-03-02 | 9 | DCU | 3000m, 5000m, Road, XC |
| C. Bolton | f | 1977-03-12 | 1977-03-12 | 1 | QUB | XC |
| Rachel Boner | f | 2022-01-29 | 2022-04-09 | 6 | AIT | 400m, 4x100m, 4x200m, 4x400m |
| Eve Bonham | f | 1968-05-01 | 1968-05-11 | 5 | TCD | DT, HJ, JTo |
| Sophie Bonus | f | 2016-04-15 | 2016-04-16 | 1 | IT Carlow | JT |
| Chloe Boomer | f | 2013-02-01 | 2013-06-01 | 10 | IUAA, UU | 100m, 200m, 4x100m, 60m |
| Janette Boran | f | 2005-12-10 | 2005-12-11 | 1 | WIT | 3000m |
| Ruth Boreland | f | 2000-11-12 | 2000-11-12 | 1 | QUB | Road |
| Elena Borlengitti | f | 2013-11-23 | 2013-11-23 | 1 | UCC | Road |
| Nuala Bose | f | 2022-11-11 | 2022-11-11 | 1 | MU | Road |
| Angelika Helene Boskamp | f | 1970-03-14 | 1970-03-14 | 1 | TCD | XC |
| Evie Boswell | f | 1999-11-13 | 1999-11-13 | 1 | TCD | Road |
| Monique Botha | f | 2014-02-07 | 2014-04-12 | 5 | AIT | 200m, 4x200m, 60m, TJ |
| V. Bothans | f | 1995-03-11 | 1995-03-11 | 2 | Birmingham | 1500m, 800m |
| Rachel Bothwell | f | 1992-04-24 | 1992-04-25 | 2 | TCD | 100m, 200m |
| K. Bottom | f | 1977-05-06 | 1978-05-06 | 5 | QUB | 100m, 200m, DT, LJ |
| Ciara Boulman | f | 2024-04-05 | 2024-04-06 | 1 | TCD | 800m |
| Charlotte Bourke | f | 2022-04-08 | 2024-04-06 | 12 | TCD | 400m, 400mH, 4x100m, 4x200m, 4x400m |
| Noeleen Bourke | f | 2002-12-06 | 2003-04-26 | 6 | UCD | 20lbWfD, DT, HT, SP |
| Sarah Bourke | f | 2014-02-07 | 2016-04-16 | 5 | DCU | 1500mW |
| Hannah Bowe | f | 2002-06-18 | 2002-06-18 | 1 | NI U23 | SP |
| Ruth Bowe | f | 2014-02-07 | 2016-04-16 | 15 | IT Carlow | 1500m, 200m, 400m, 4x100m, 4x200m, 800m, Road |
| Gabriella Bowen | f | 2024-02-10 | 2024-04-06 | 7 | MTU | 4x100m, 4x200m, 60m, LJ, TJ |
| Rachel Bowler | f | 2019-02-08 | 2019-04-06 | 7 | UL | 4x100m, 4x200m, LJ, TJ |
| Carla Bowyer | f | 2009-11-14 | 2009-11-14 | 1 | UU | Road |
| S. Bowyer | f | 1995-03-11 | 1995-03-11 | 2 | Loughborough | 1500m, 800m |
| Emer Boyce | f | 2015-04-10 | 2015-04-11 | 1 | DCU | JT |
| Evelyn Boyd | f | 1985-05-03 | 1988-04-30 | 4 | UCD | DT, JTo, SP |
| Alicia Boylan | f | 2013-11-23 | 2015-02-06 | 4 | UG | 1500mW, Road |
| Anna Boyle | f | 1998-06-23 | 2006-04-22 | 45 | IUAA, NI U23, UU | 100m, 200m, 4x100m, 4x400m, 60m, HJ, LJ |
| Catherine M.T. Boyle | f | 1970-05-09 | 1970-05-13 | 11 | TCD | 100m, 200m, 4x100m, DT, JTo, LJ |
| Janet Boyle | f | 1983-05-06 | 1987-05-09 | 4 | QUB | 400m, HJ |
| Janine Boyle | f | 2018-02-09 | 2019-05-25 | 6 | Ireland, UU | 100m, 4x100m, 4x200m, 60m |
| Janine Boyle | f | 2019-04-05 | 2019-04-06 | 3 | UU | 100m, 4x100m |
| Janine Boyle | f | 2020-02-15 | 2020-02-15 | 6 | UU | 200m, 4x200m, 60m |
| Janine Boyle | f | 2022-04-08 | 2022-04-09 | 2 | UU | 200m |
| Niamh Boyle | f | 2002-04-19 | 2002-04-20 | 1 | TCD | 5000m |
| Patricia Boyle | f | 2011-04-29 | 2011-04-30 | 3 | UU | 100m, 4x100m, LJ |
| Tamara Boyle | f | 2012-07-18 | 2012-07-18 | 1 | Derry City | 400m |
| Veronica Boyle | f | 1997-06-24 | 1997-06-24 | 1 | NI U23 | 1500m |
| Caroline Bracken | f | 2004-02-06 | 2005-04-23 | 6 | DCU | 100m, 200m, 4x100m, 4x200m |
| Siobhan Bracket | f | 2008-04-18 | 2008-04-19 | 1 | WIT | PV |
| Kara Bradbeer | f | 2014-05-31 | 2014-05-31 | 1 | SUCA | PV |
| Kara Bradbeer | f | 2016-05-28 | 2016-05-28 | 1 | SUCA | PV |
| C. Bradley | f | 1995-03-11 | 1995-03-11 | 1 | SU | 1500m |
| Catherine Bradley | f | 2012-04-20 | 2012-04-21 | 1 | AIT | SP |
| P. Bradley | f | 1979-03-17 | 1980-03-01 | 2 | QUB | XC |
| Georgina Bradshaw | f | 1999-11-13 | 2000-02-26 | 2 | DIT, GST | Road, XC |
| Josephine Bradshaw | f | 1993-03-06 | 1997-06-24 | 17 | IUAA, TCD, UL | 100mH, 400m, 400mH, 4x400m, 60mH, CE, XC |
| Aine Brady | f | 2018-02-09 | 2019-02-08 | 8 | DCU, Ireland | 400m, 400mH, 4x200m, 4x400m |
| Andrea Brady | f | 2020-02-15 | 2020-03-07 | 2 | AIT | 3000m, XC |
| Ann B. Brady | f | 1984-05-04 | 1988-04-30 | 10 | TCD | 400m, 400mH, 4x100m, 4x400m |
| Anna Brady | f | 2005-04-22 | 2005-04-23 | 2 | UL | 100mH, PV |
| Aoife Brady | f | 2003-11-22 | 2007-04-14 | 17 | DCU, IUAA | 1500m, 3000m, 4x400m, 800m, Road, XC |
| Aoife Brady | f | 2005-02-05 | 2005-02-05 | 1 | UCD | XC |
| Aoife Brady | f | 2003-04-25 | 2003-04-26 | 4 | TCD | 400m, 4x100m, 4x400m, TJ |
| Claire Brady | f | 2005-12-10 | 2009-04-25 | 32 | DCU | 100m, 200m, 4x100m, 4x200m, 4x400m, 60m, JT, PV |
| Claire Brady | f | 2013-02-01 | 2016-04-16 | 13 | UL | 200m, 20lbWfD, 4x200m, 60m |
| Kelly Brady | f | 2016-02-12 | 2016-04-16 | 4 | UCC | 16lbWfD, 20lbWfD, HT, SP |
| Lynn Brady | f | 2005-11-19 | 2005-11-19 | 1 | TCD | Road |
| M. Brady | f | 1983-05-06 | 1983-05-07 | 2 | TCE | 100mH, 400mH |
| Niamh Brady | f | 2023-11-10 | 2024-11-08 | 7 | DCU | 1500m, Road, XC |
| Patricia Brady | f | 2005-11-19 | 2006-04-22 | 5 | UU | 3000m, 5000m, 800m, Road, XC |
| R. Brady | f | 1990-03-03 | 1990-03-03 | 1 | TCE | XC |
| Sarah Brady | f | 2023-11-10 | 2023-11-10 | 1 | DCU | Road |
| Jennifer Braga | f | 1995-06-17 | 1995-06-20 | 2 | H & Y | HJ |
| C. Brally | f | 1980-05-02 | 1980-05-03 | 1 | QUB | 200m |
| S. Brally | f | 1980-05-02 | 1980-05-03 | 1 | QUB | 100m |
| Maria Branagan | f | 1990-04-27 | 1994-04-23 | 9 | SPM | 100m, 200m, 60m, SP |
| Maebh Brannigan | f | 2015-11-14 | 2016-11-19 | 6 | UG | 800m, Road, XC |
| Maebh Brannigan | f | 2017-02-10 | 2022-04-09 | 11 | UG | 1500m, 4x400m, 800m, Road |
| Ali Branton | f | 2000-04-14 | 2000-04-15 | 1 | RCSI | 5000m |
| Maeve Brassil | f | 2012-03-10 | 2016-03-05 | 9 | UG | 1500m, 800m, Road, XC |
| Sive Brassil | f | 2013-11-23 | 2013-11-23 | 1 | UCD | Road |
| Ainé Breathnach | f | 1996-02-09 | 1996-02-10 | 4 | TCD | 200m, 4x200m, 60m |
| Kelly Breen | f | 2022-04-08 | 2023-04-22 | 4 | DCU | 1500m, Road |
| Doireann Bregazzi Nevin | f | 2006-12-02 | 2008-04-19 | 9 | DCU | 20lbWfD, DT, HT, PV, SP, TJ |
| Sandra Breheny | f | 2001-04-20 | 2001-04-21 | 1 | AIT | 3000m |
| Ailish Brennan | f | 2010-11-13 | 2013-02-01 | 8 | DCU | 4x200m, 800m, Road |
| Aine Brennan | f | 2009-02-14 | 2009-02-15 | 1 | UG | TJ |
| Claire Brennan | f | 2013-03-09 | 2017-02-10 | 6 | DCU | 1500m, Road, XC |
| Eabha Brennan | f | 2024-10-19 | 2024-11-08 | 2 | TCD | Road, XC |
| Emer Brennan | f | 2009-02-14 | 2009-02-15 | 1 | IT Carlow | LJ |
| Gillian Brennan | f | 1991-03-02 | 1992-03-07 | 2 | DIT, GST | XC |
| Grainne Brennan | f | 2010-03-13 | 2010-11-13 | 2 | DCU | Road, XC |
| Katie Brennan | f | 2014-02-07 | 2014-02-07 | 2 | DCU | 4x200m |
| Laura Brennan | f | 2013-11-23 | 2018-04-14 | 16 | TCD | 1500m, 3000m, 4x400m, 5000m, Road, XC |
| Maeve Brennan | f | 1992-04-24 | 1992-04-25 | 2 | UU | 100m, 200m |
| Mary Brennan | f | 1999-12-03 | 1999-12-04 | 1 | WIT | 1500mW |
| Mary Brennan | f | 1996-04-19 | 1996-04-20 | 1 | Waterford RTC | 5000m |
| Niamh Brennan | f | 2002-12-06 | 2002-12-07 | 1 | IT Carlow | 1500mW |
| Sile Brennan | f | 2002-11-16 | 2005-02-26 | 13 | QUB | 3000m, 4x100m, 5000m, 60mH, CE, HJ, Road, SP, XC |
| Clemence Brenterch | f | 2014-04-11 | 2014-04-12 | 1 | IT Tallaght | 1500m |
| Maeve Brereton | f | 2017-04-07 | 2017-04-08 | 2 | UCD | 100m, 4x100m |
| A. Breslin | f | 1983-03-12 | 1983-03-12 | 1 | TCE | XC |
| Carol Breslin | f | 1982-03-06 | 1983-05-07 | 4 | TCE | 1500m, 3000m, XC |
| Caroline Bresnihan | f | 2007-12-08 | 2007-12-09 | 1 | IT Carlow | 60m |
| Emily Brick | f | 2009-02-14 | 2010-02-13 | 11 | UCC | 400m, 4x200m, 60m, 60mH, CE, HJ, LJ, Road, SP, TJ |
| Rachael Briggs | f | 2016-02-12 | 2016-04-16 | 2 | IT Carlow | JT, SP |
| Tracey Brindley | f | 1993-06-22 | 1993-06-22 | 1 | SU | 3000m |
| Rebecca Briscoe | f | 2006-12-02 | 2006-12-03 | 1 | WIT | 800m |
| Fionnuala Britton | f | 2003-11-22 | 2009-11-14 | 20 | DCU | 3000m, 3000mSC, 400mH, 5000m, Road, XC |
| Julia Britton | f | 2019-03-02 | 2019-11-16 | 3 | UG | 5000m, Road, XC |
| Mary Britton | f | 2003-03-09 | 2003-03-09 | 1 | DCU | XC |
| Una Britton | f | 2009-11-14 | 2013-04-13 | 18 | UL | 1500m, 3000m, 3000mSC, 4x400m, 5000m, PV, Road, XC |
| Una Britton | f | 2016-11-19 | 2018-11-17 | 5 | DCU | 5000m, Road, XC |
| Christina Broderick | f | 2006-12-02 | 2010-04-24 | 48 | UL | 100mH, 400m, 400mH, 4x100m, 4x200m, 4x400m, 60mH, CE, HJ, LJ, SP, TJ |
| N. Broderick | f | 1970-03-14 | 1970-03-14 | 1 | UCC | XC |
| Ciara Broderick Farrel | f | 2014-11-15 | 2015-03-07 | 3 | TCD | Road, XC |
| Ciara Broderick Farrell | f | 2016-11-19 | 2016-11-19 | 1 | TCD | Road |
| Iona Brodie | f | 2013-06-01 | 2013-06-01 | 1 | GST | 4x400m |
| Iona Brodie | f | 2013-06-01 | 2013-06-01 | 1 | SU | 800m |
| Niamh Brogan | f | 2016-11-19 | 2017-03-04 | 3 | TCD | Road, XC |
| Niamh Brogan | f | 2018-03-10 | 2020-03-07 | 3 | TCD | Road, XC |
| Amy Brogren | f | 2009-11-14 | 2009-11-14 | 1 | UCD | Road |
| C. Brolly | f | 1983-05-06 | 1983-05-07 | 2 | QUB | 100m, 200m |
| C. Brolly | f | 1979-05-04 | 1979-05-05 | 1 | QUB | 100m |
| Jenna Bromell | f | 2016-02-12 | 2019-02-08 | 20 | UL | 400m, 4x100m, 4x200m, 4x400m, 800m |
| R. Brookes | f | 1977-05-06 | 1980-05-03 | 11 | QUB | DT, JTo, SP |
| A. Brosnan | f | 1989-05-05 | 1989-05-06 | 1 | GST | 1500mW |
| Fiona Brosnan | f | 2002-11-16 | 2002-11-16 | 1 | UCC | Road |
| C. Brown | f | 1999-03-06 | 1999-03-06 | 1 | UU | XC |
| Emily Brown | f | 2007-03-31 | 2007-03-31 | 1 | Welsh Universities | XC |
| Gillian Brown | f | 1995-06-20 | 1995-06-20 | 1 | NI U23 | 800m |
| Isabel Brown | f | 2016-03-05 | 2016-03-05 | 1 | TCD | XC |
| Katie Brown | f | 2003-11-22 | 2003-11-22 | 1 | GST | Road |
| Molly Brown | f | 2019-11-16 | 2021-11-13 | 2 | DCU | Road |
| Naomi Brown | f | 2003-11-22 | 2003-11-22 | 1 | UU | Road |
| Siobhán Brown | f | 1991-03-02 | 1991-03-02 | 1 | DIT | XC |
| Siobhan Brown | f | 1995-06-17 | 1995-06-17 | 1 | Dublin | 800m |
| Suzannah Brown | f | 2012-07-18 | 2012-07-18 | 1 | Ballymena & Antrim AC | 800m |
| Zoe Brown | f | 2000-06-20 | 2002-06-18 | 2 | NI U23 | PV |
| Michelle Browne | f | 1993-02-12 | 1993-02-12 | 1 | UCC | HJ |
| Richael Browne | f | 2017-11-18 | 2020-02-15 | 9 | Ireland, UCD | 1500m, 800m, Road |
| Rosie Browne | f | 2019-05-25 | 2019-05-25 | 1 | Scotland | PV |
| Jill Bruce | f | 1993-03-06 | 1996-06-25 | 9 | IUAA, UU | 1500m, 3000m, 5000m, XC |
| P. Bruce | f | 1977-06-14 | 1977-06-14 | 1 | Birmingham | LJ |
| Elise Bruen | f | 2017-02-10 | 2017-02-10 | 3 | UCD | 200m, 4x200m |
| Valerie Brunton | f | 2004-01-24 | 2006-04-22 | 6 | TCD | 5000m, LJ, Road, XC |
| Jessica Bruton | f | 2015-11-14 | 2017-03-04 | 4 | UCC | Road, XC |
| Jocelyn Mary Bryars | f | 1970-05-13 | 1970-05-13 | 1 | TCD | HJ |
| Irene Buchmann | f | 2014-11-15 | 2014-11-15 | 1 | UCC | Road |
| Barbara Buckley | f | 1970-03-14 | 1970-03-14 | 1 | UCC | XC |
| C. Buckley | f | 1981-03-07 | 1981-03-07 | 1 | UCC | XC |
| Helen Buckley | f | 2003-04-25 | 2007-04-14 | 41 | GST, IUAA, NCI, UL | 100mH, 60mH, CE, HJ, JT, LJ, PV, SP, TJ |
| Leonie Buckley | f | 2012-11-17 | 2012-11-17 | 1 | TCD | Road |
| Robyn Buckley | f | 2023-11-10 | 2024-11-08 | 6 | UCC | 3000m, 3000mSC, Road, XC |
| Sheila Buckley | f | 1999-12-03 | 2003-04-26 | 26 | UL | 100m, 200m, 4x100m, 4x200m, 60m |
| Therese Buckley | f | 1995-12-16 | 1995-12-16 | 1 | Carlow RTC | XC |
| Una Buckley | f | 2015-11-14 | 2015-11-14 | 1 | UCC | Road |
| Cathy Budden | f | 1996-06-25 | 1996-06-25 | 2 | NI U23 | 200m, 400mH |
| Monika Budukiewicz | f | 2013-11-23 | 2015-03-07 | 2 | CIT | Road, XC |
| Saragh Buggy | f | 2014-02-07 | 2020-02-15 | 11 | DCU | TJ |
| Anica Bulic | f | 2007-11-17 | 2007-11-17 | 1 | TCD | Road |
| C. Bunyan | f | 1973-05-11 | 1973-05-16 | 4 | UCD | HJ, SP |
| D. Burden | f | 1993-06-22 | 1993-06-22 | 1 | SU | 400m |
| C. Burgoyne | f | 1995-03-11 | 1995-03-11 | 2 | Birmingham | 400m, TJ |
| Aine Burke | f | 2019-11-16 | 2024-04-06 | 7 | DCU | 3000mSC, Road, XC |
| Alison Burke | f | 2019-02-08 | 2020-02-15 | 13 | DCU, Ireland | 100mH, 200m, 4x100m, 60mH, CE, HJ, LJ, SP |
| Ann Geraldine Burke | f | 1975-03-08 | 1976-05-01 | 3 | TCD | DT, XC |
| E. Burke | f | 1989-05-05 | 1989-05-06 | 1 | TCE | 200m |
| G. Burke | f | 1981-03-07 | 1982-05-12 | 2 | UCD | 400m, XC |
| Isabella Burke | f | 2024-10-19 | 2024-11-08 | 2 | UCD | Road, XC |
| Kate Burke | f | 2016-11-19 | 2016-11-19 | 1 | TCD | Road |
| M. Burke | f | 1979-05-04 | 1981-05-13 | 3 | TCD | 1500m, 800m, XC |
| Marie Burke | f | 2003-11-22 | 2003-11-22 | 1 | TCD | Road |
| Noeleen Burke | f | 1999-04-23 | 1999-04-24 | 3 | UCD | DT, HT, SP |
| Olive Burke | f | 1985-05-03 | 1987-05-09 | 7 | UCD | 100m, 100mH, 200m, LJ |
| Sheila Burke | f | 1985-03-09 | 1987-05-09 | 4 | NIHED | 1500m, 800m, XC |
| Veronica Burke | f | 2015-11-14 | 2019-02-08 | 7 | DIT | 1500mW, Road |
| M. Burn | f | 1975-03-08 | 1975-03-08 | 1 | SPM | XC |
| Alexandra Burns | f | 2018-05-26 | 2018-05-26 | 3 | Scotland | 4x100m, LJ, TJ |
| Ann Marie Burns | f | 2004-12-03 | 2005-04-23 | 6 | DCU | HJ, JT, LJ, SP, TJ |
| Eileen Burns | f | 2000-11-12 | 2001-02-24 | 3 | TCD | 3000m, Road, XC |
| Kellie Burns | f | 1997-11-22 | 1998-04-25 | 4 | TCD | 3000m, 4x400m, Road, XC |
| L. Burns | f | 1994-06-28 | 1994-06-28 | 1 | NI U20 | 200m |
| Patricia Burns | f | 2010-03-13 | 2010-03-13 | 1 | TCD | XC |
| Rebecca Burns | f | 2014-05-31 | 2014-05-31 | 1 | SUCA | 800m |
| Carol Burtenshaw | f | 2004-02-06 | 2004-02-07 | 1 | WIT | 1500mW |
| Grainne Butler | f | 1982-03-06 | 1986-05-03 | 7 | UCD | 1500m, 3000m, XC |
| K. Butler | f | 1995-03-11 | 1995-03-11 | 2 | Loughborough | 200m, 60m |
| Leah Butler | f | 2003-11-22 | 2006-04-22 | 16 | TCD | 1500m, 1500mW, 20lbWfD, HT, Road, XC |
| M. Butler | f | 1983-03-12 | 1983-03-12 | 1 | UCD | XC |
| Mary Butler | f | 1973-03-10 | 1975-05-21 | 13 | UCD | 1500m, 800m, LJ, XC |
| P. Butler | f | 1975-05-02 | 1975-05-21 | 2 | UCD | DT, JTo |
| Sarah Butler | f | 2023-11-10 | 2024-11-08 | 5 | UCC | 800m, Road, XC |
| Lia Butler Lynch | f | 2024-10-19 | 2024-11-08 | 2 | TCD | Road, XC |
| Josepha Buttle | f | 2001-12-07 | 2004-04-17 | 16 | WIT | 100m, 200m, 400m, 4x200m, LJ, SP, TJ |
| Katey Byrd | f | 2004-12-03 | 2012-02-04 | 59 | TCD, UCC | 100m, 100mH, 200m, 20lbWfD, 4x100m, 4x200m, 4x400m, 60m, 60mH, CE, HJ, LJ, Road, SP, TJ |
| A. Byrne | f | 1979-05-04 | 1980-05-14 | 11 | UCD | 100m, 400m, 800m, HJ, LJ |
| Anna Byrne | f | 2024-03-09 | 2024-03-09 | 1 | QUB | XC |
| Aoife Byrne | f | 2003-04-25 | 2005-04-23 | 9 | UCD | 1500m, 3000m, 4x400m, 800m, Road |
| Aoife Byrne | f | 2008-11-15 | 2010-04-24 | 6 | TCD | 1500m, 3000m, 4x400m, Road, XC |
| Brid Byrne | f | 2001-12-07 | 2002-12-07 | 5 | WIT | 1500m, 4x200m, 800m, XC |
| Caoimhe Byrne | f | 2018-02-09 | 2018-02-09 | 2 | DCU | 20lbWfD, PV |
| Deirdre Byrne | f | 2008-04-18 | 2008-04-19 | 1 | UCD | 3000m |
| Denise Byrne | f | 2015-02-06 | 2017-04-08 | 14 | CIT, IUAA | 200m, 4x100m, 4x200m, 4x400m, JT, LJ, SP |
| Derval Byrne | f | 1998-02-28 | 1998-02-28 | 1 | UCC | XC |
| E. Byrne | f | 1983-03-12 | 1983-03-12 | 1 | TCD | XC |
| Ellen Byrne | f | 2016-11-19 | 2016-11-19 | 1 | UCD | Road |
| Ellen Byrne | f | 2018-04-13 | 2018-04-14 | 1 | DIT | 4x400m |
| Emer Byrne | f | 1988-03-01 | 1988-03-01 | 1 | UCD | XC |
| Fiona Byrne | f | 1999-04-23 | 1999-04-24 | 1 | UL | 400m |
| Leona Byrne | f | 2005-12-10 | 2012-04-21 | 56 | DCU, WIT | 100mH, 4x100m, 60mH, CE, DT, HJ, JT, LJ, SP, TJ |
| Leona Byrne | f | 2016-02-12 | 2017-02-10 | 2 | DCU | HJ |
| Linda Byrne | f | 2016-04-15 | 2016-04-16 | 1 | GST | 1500m |
| Linda Byrne | f | 2004-11-20 | 2010-11-13 | 27 | DCU, IUAA | 3000m, 3000mSC, 400mH, 4x400m, 5000m, 800m, Road, XC |
| Maria Byrne | f | 1976-04-30 | 1978-03-04 | 3 | UCG | LJ, XC |
| Mary Byrne | f | 1995-03-04 | 1998-02-28 | 8 | GST, UCD | 1500m, 800m, HJ, XC |
| Micheala Byrne | f | 2022-01-29 | 2022-01-29 | 2 | IT Sligo | LJ, TJ |
| P. Byrne | f | 1978-03-04 | 1978-03-04 | 1 | UCG | XC |
| S. Byrne | f | 1982-04-30 | 1983-05-07 | 4 | TCE | JTo, SP |
| S. Byrne | f | 1981-05-01 | 1981-05-02 | 3 | TCD | DT, JTo, SP |
| Sadbh Byrne | f | 2019-11-16 | 2022-03-05 | 4 | UCD | Road, XC |
| Sarah Byrne | f | 2013-02-01 | 2013-04-13 | 2 | IT Carlow | 800m, LJ |
| Sarah Byrne | f | 2022-01-29 | 2024-11-08 | 7 | TCD | 1500m, 4x1000m, Road, XC |
| Kelly Byrnes | f | 1998-01-31 | 1998-01-31 | 1 | TCD | XC |
| Maeve Byrnes | f | 2023-11-10 | 2023-11-10 | 1 | MU | Road |