| IRELAND | ALL-TIME LISTS | 400m | MEN | Updated 31.12.2009 | ||
| Marca | Nom | Cognom | Neixament | Lloc | Ciutat | Data |
| 44.77 | David | Gillick | 9.7.83 | 1 | Madrid | 4.7.2009 |
| 45.58 | Paul | McKee | 15.11.77 | 1 | Dublin | 14.7.2002 |
| 45.73 | Derek | O'Connor | 14.6.65 | 3 | Indianapolis | 5.6.1986 |
| 45.84 | Tomas | Coman | 10.11.79 | 3 | Dublin | 29.7.2000 |
| 45.98 | Robert | Daly | 26.1.78 | 2 | Morton Dublin | 25.7.2004 |
| 46.05 | David | McCarthy | 16.7.83 | 2h1 | Bydgoszcz | 18.7.2003 |
| 46.11 | Paul | McBurney | 14.3.72 | 5 | Budapest | 3.7.1999 |
| 46.26 | Brian | Gregan | 31.12.89 | 1 | London | 8.8.2009 |
| 46.34 | Eugene | Farrell | 21.4.73 | 2s | Sydney | 8.3.1996 |
| 46.37 | Kieran | Finn | 13.4.61 | 3 | Sydney | 23.1.1993 |
| 46.48 | Gordon | Kennedy | 9.3.81 | 6 | Heusden | 28.7.2007 |
| 46.61 | Gerry | Delaney | 9.11.56 | 1 | Dublin | 16.8.87 |
| 46.79 | Paul | Opperman | 20.12.79 | 4 | Morton Dublin | 29.7.2000 |
| 46.83A | Noel | Carroll | 7.12.41 | 6 | Ciudad de Mexico | 16.10.1968 |
| 46.83 | Tomas | McGuirk | 2.3.71 | Berkeley | 7.5.1994 | |
| 46.84 | Brian | Forbes | 6.9.74 | 2 | Coimbra | 20.7.1997 |
| 46.88 | Antoine | Burke | 20.7.75 | 3 | Dublin | 14.7.2002 |
| 47.07 | Fanahan | McSweeney | 21.8.47 | 5h5 | München | 3.9.1972 |
| 47.07 | Brian | Murphy | 16.9.82 | 1rC | La Chaux de Fonds | 28.6.2009 |
| 47.12 | Brian | Doyle | 12.3.77 | 5 | Dublin | 29.7.2006 |
| 47.17 | Sean | McAteer | 72 | 1 | Dublin | 24.7.1994 |
| 47.20 | Peter | Sinclair | 6.3.67 | 1 | Viseu | 22.6.1991 |
| 47.26 | Paul | O'Regan | 21.8.66 | 7 | Cottbus | 24.8.1985 |
| 47.27 | Curtis | Woods | 93 | 4 | Pune | 15.10.2008 |
| 47.32 | David | Finnegan | 20.9.75 | 2 | Morton Dublin | 20.8.2000 |
| 47.34 | Brendan | Murphy | 70 | 1 | Dublin | 29.4.1990 |
| 47.43 | Brian | Liddy | 16.6.77 | 2 | Dublin | 15.7.1998 |
| 47.44 | Stephen | Newman | 26.12.70 | 1 | Belfast | 4.6.1994 |
| 47.48 | Brian | Dunne | 61 | Morton | 1981 | |
| 47.50[1] | Gary | Ryan | 12.6.72 | 1 | Limerick | 17.6.2000 |
| 47.53 | Niall | Hegarty | 3 | Miami | 4.4.1992 | |
| 47.60[2] | Paul | Kelliher | 5.1.71 | 5 | Cork | 24.6.1995 |
| 47.60[3] | Anthony | Foran | 73 | 6 | Cork | 24.6.1995 |
| 47.60 | Darren | Hough | 2.9.77 | 2 | Morton Dublin | 20.8.2000 |
| 47.70 | J. J. | Barry | 61 | 1 | Dublin | 30.4.1988 |
| 47.74 | Philip | Snoddy | 3.2.51 | 2 | Dublin | 30.4.1988 |
| 47.74 | Damian | Lowry | 78 | 6 | Philadelphia | 13.5.2001 |