| - | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | Y | Z |
| Athlete | Sex | First Appearance | Last Appearance | Appearances | Colleges | Race Types |
|---|---|---|---|---|---|---|
| Ewan Jack | m | 1994-06-28 | 1994-06-28 | 2 | SU | 3000mSC, 800m |
| H.W. Jack | m | 1912-06-03 | 1913-05-24 | 2 | UCC | Mile |
| Adrian Jackman | m | 2006-04-21 | 2010-02-13 | 23 | WIT | 100m, 110mH, 200m, 60m, 60mH |
| Nicholas Jackman | m | 2002-04-19 | 2002-04-20 | 1 | Guest | DT |
| Greg Jackson | m | 2006-03-04 | 2006-03-04 | 1 | NUIG | XC |
| Karl Jackson | m | 2000-02-26 | 2000-02-26 | 1 | UCC | XC |
| Jeku Jacob | m | 2006-12-02 | 2008-04-19 | 4 | UCD | HJ, LJ, TJ |
| J. Jagoe | m | 1956-05-16 | 1957-05-18 | 2 | UCC | 880y |
| J.O. Jagoe | m | 1924-05-31 | 1926-06-05 | 8 | UCC | 440y, 880y, LJ, Mile |
| R.B. Jagoe | m | 1922-06-10 | 1922-06-10 | 1 | UCC | 3 Miles |
| A. James | m | 1999-03-06 | 1999-03-06 | 1 | Guest | XC |
| Kieran James | m | 2009-11-14 | 2010-02-13 | 2 | UCC | 1500m, Road |
| I. Jefferies | m | 1966-05-07 | 1968-05-11 | 3 | TCD | HJ |
| Jamie Jeffers | m | 2002-11-16 | 2002-12-07 | 2 | UCC | 800m, Road |
| Finbarr Jeffords | m | 1973-05-11 | 1975-05-03 | 5 | UCC | 100m, 200m |
| Nathan Jege | m | 2010-02-13 | 2010-02-13 | 1 | UCC | LJ |
| Robert Jenkins | m | 1996-06-25 | 1996-06-25 | 2 | SU | DT, SP |
| Barry Jenkinson | m | 1996-12-13 | 1996-12-14 | 4 | Carlow RTC | 200m, 60m |
| Cathal Jenkinson | m | 2007-11-17 | 2009-04-25 | 5 | UCD | 1500m, 3000mW, Road, XC |
| Kian Jennings | m | 2009-03-07 | 2009-03-07 | 1 | UCD | XC |
| Mark Jennings | m | 2008-11-15 | 2009-03-07 | 3 | UCD | 1500m, Road, XC |
| Seth Jenny | m | 2000-02-26 | 2000-04-15 | 3 | UL | 3000mSC, 5000m, XC |
| Irfaan Jetha | m | 2002-04-19 | 2002-04-20 | 1 | RCSI | 200m |
| Connor Johnson | m | 2007-11-17 | 2007-11-17 | 1 | TCD | Road |
| H.C. Johnson | m | 1912-06-03 | 1912-06-03 | 1 | UCC | 2 Mile Cycle |
| J.W. Johnson | m | 1926-06-05 | 1926-06-05 | 1 | TCD | 880y |
| N. Johnson | m | 1982-04-30 | 1982-05-01 | 1 | UCG | 400m |
| Weldon Johnson | m | 1995-06-20 | 1995-06-20 | 1 | H & Y | 5000m |
| Connor Johnston | m | 2007-12-08 | 2007-12-09 | 2 | TCD | 1500m, 3000m |
| Conor Johnston | m | 2005-11-19 | 2005-11-19 | 1 | TCD | Road |
| E. Johnston | m | 1928-06-02 | 1928-06-02 | 1 | TCD | 880y |
| Gary Johnston | m | 2003-03-09 | 2003-03-09 | 1 | QUB | XC |
| Aidan Jones | m | 2008-11-15 | 2008-11-15 | 1 | UCD | Road |
| Simon Jones | m | 1995-06-20 | 1996-06-25 | 2 | SU | HJ |
| Mike Jonstone | m | 2007-03-31 | 2007-03-31 | 1 | Welsh Universities | XC |
| P. Jordan | m | 1976-04-30 | 1977-05-07 | 5 | UCG | 400m, LJ, TJ |
| Shane Jordan | m | 2004-01-24 | 2004-02-28 | 2 | TCD | XC |
| A. Joyce | m | 1983-05-06 | 1983-05-07 | 1 | UCD | JT* |
| Damien Joyce | m | 1999-04-23 | 1999-04-24 | 2 | IT Tallaght | 800m |
| Eamon Joyce | m | 2001-12-07 | 2003-04-26 | 7 | UCC | 35lbWfD, DT, HT, JT, SP |
| Eamonn Joyce | m | 2004-04-16 | 2004-04-17 | 2 | Guest | 35lbWfD, DT |
| Eoin Joyce | m | 2007-04-13 | 2008-04-19 | 9 | UCC | 100m, 200m |
| J. Joyce | m | 1954-05-22 | 1957-05-18 | 3 | UCD | JT* |
| Owen Joyce | m | 2009-02-14 | 2010-02-13 | 2 | NUIG | 3000m |
| P. Joyce | m | 1949-05-26 | 1949-05-26 | 1 | UCG | SP |
| Bryan Just | m | 1995-06-20 | 1995-06-20 | 1 | H & Y | 800m |
| Elaine Jackson | f | 2002-04-19 | 2002-04-20 | 3 | UCD | DT, HT, SP |
| Sarah Jacobson | f | 2006-11-18 | 2007-02-24 | 2 | TCD | Road, XC |
| Delyth James | f | 2009-03-28 | 2009-03-28 | 1 | Wales | XC |
| L. Jameson | f | 1984-05-04 | 1984-05-05 | 1 | QUB | DT |
| Vicki Jamison | f | 1993-06-22 | 1999-04-24 | 14 | IUAA, NI U20, NI U23, UU | 100mH, 200m, 400mH, 4x100m, 4x400m |
| Lisa Jeffers | f | 1996-06-25 | 1996-06-25 | 1 | NI U23 | JT* |
| Michelle Jeffrey | f | 1993-06-22 | 1994-06-28 | 2 | SU | 3000m |
| L. Jenkins | f | 1986-05-02 | 1986-05-03 | 1 | UCD | 400m |
| S. Jenkins | f | 1985-05-03 | 1986-05-03 | 2 | TCE | 3000m |
| Janine Jensen | f | 2002-04-19 | 2004-04-17 | 14 | IUAA, TCD | 1500m, 4x200m, 800m, 8kgWfD, Road, XC |
| Andrea Johnson | f | 2004-11-20 | 2004-11-20 | 1 | UCD | Road |
| Barbara Johnson | f | 1982-04-30 | 1984-05-05 | 5 | UCC | 400mH, HJ, LJ |
| H. Johnson | f | 1969-05-03 | 1969-05-03 | 2 | QUB | HJ, LJ |
| Helen Johnston | f | 1998-06-23 | 1999-06-22 | 3 | SU | 100m, 100mH |
| Valerie Johnston | f | 1993-06-22 | 1994-06-28 | 2 | NI U20 | SP |
| Athena Jones | f | 1995-06-20 | 1995-06-20 | 1 | H & Y | 100m |
| Caryl Jones | f | 2007-03-31 | 2009-03-28 | 2 | Wales, Welsh Universities | XC |
| E. Jones | f | 1995-06-20 | 1995-06-20 | 1 | H & Y | 400m |
| G. Jones | f | 1993-06-22 | 1993-06-22 | 1 | Guest | 400mH |
| T. Jones | f | 1982-04-30 | 1982-05-01 | 1 | TCE | 100m |
| Adrienne Jordan | f | 1998-02-28 | 2001-11-07 | 6 | Dublin Colleges, President's Select, TCD | Road, XC |
| Barbara Joyce | f | 1994-02-19 | 1994-02-19 | 1 | Guest | XC |