Tallest: 1 · Year
By quarter-hour; stoppage time counts as the 45th or 90th minute.
Tallest: 1 · Minute
Republic of Ireland's matches with known line-ups from their first recorded cap to their last.
| With them | 6 | 4 | 1 | 1 | 6 | 3 | 66.7% |
| Without them | 22 | 11 | 8 | 3 | 30 | 17 | 50% |
| Aki Riihilahti | Finland | 1 |
| Andy Van der Meyde | Netherlands | 1 |
| Arjen Robben | Netherlands | 1 |
| Arkadiusz Glowacki | Poland | 1 |
| Arkadiusz Radomski | Poland | 1 |
| Artur Boruc | Poland | 1 |
| Bartholomew Ogbeche | Nigeria | 1 |
| Bosko Balaban | Croatia | 1 |
| Christian Obodo | Nigeria | 1 |
| Clarence Seedorf | Netherlands | 1 |
Finals and qualifying campaigns alike.
| 2 Jun 2004 | v Jamaica | 1–0 | 26′ | — | Winning goal | 1–0 | Unity Cup 2004 |
| 21 Aug 2002 | v Finland | 3–0 | 83′ | — | Extended lead | 3–0 | Friendly |
In a recorded line-up, on the scoresheet or booked. “—” where the line-up isn't known.
| 16 Nov 2004 | v Croatia | 1–0 | came on 84′ | 6 | — | — | Friendly |
| 5 Jun 2004 | v Netherlands | 1–0 | started | 90 | — | — | Friendly |
| 2 Jun 2004 | v Jamaica | 1–0 | started | 90 | 1 | — | Unity Cup 2004 |
| 29 May 2004 | v Nigeria | 0–3 | came on 83′ | 7 | — | — | Unity Cup 2004 |
| 28 Apr 2004 | v Poland | 0–0 | came on 64′ | 26 | — | — | Friendly |
| 21 Aug 2002 | v Finland | 3–0 | came on 76′ | 14 | 1 | — | Friendly |
Caps, goals and cards count what the sources record: line-ups from about 2003 (World Cups from 1970, friendlies from about 2016), and few scorers in older friendlies — so career totals run low.