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 | 21 | 9 | 7 | 5 | 21 | 19 | 42.9% |
| Without them | 36 | 14 | 16 | 6 | 46 | 32 | 38.9% |
| John Utaka | Nigeria | 2 |
| Seyi Olofinjana | Nigeria | 2 |
| Adrian Mihai Iencsi | Romania | 1 |
| Adrian Neaga | Romania | 1 |
| Aimo Diana | Italy | 1 |
| Alberto Gilardino | Italy | 1 |
| Alessandro Del Piero | Italy | 1 |
| Alessandro Nesta | Italy | 1 |
| Alex | Brazil | 1 |
| Alexander Iashvili | Georgia | 1 |
| Sweden | 1 | 1 |
Finals and qualifying campaigns alike.
Nothing here.
| 1 Mar 2006 | v Sweden | 3–0 | 70′ | — | Extended lead | 3–0 | Friendly |
In a recorded line-up, on the scoresheet or booked. “—” where the line-up isn't known.
| 14 Oct 2009 | v Montenegro | 0–0 | started | 90 | — | — | FIFA World Cup qualification 2009 |
| 29 May 2009 | v Nigeria | 1–1 | started | 90 | — | — | Friendly |
| 6 Sep 2008 | v Georgia | 2–1 | came on 77′ | 13 | — | — | FIFA World Cup qualification 2008 |
| 29 May 2008 | v Colombia | 1–0 | started | 90 | — | — | Friendly |
| 24 May 2008 | v Serbia | 1–1 | started | 90 | — | — | Friendly |
| 6 Feb 2008 | v Brazil | 0–1 | started, off 46′ | 46 | — | — | Friendly |
| 17 Nov 2007 | v Wales | 2–2 | started, off 59′ | 59 | — | — | UEFA Euro qualification 2007 |
| 17 Oct 2007 | v Cyprus | 1–1 | came on 46′ | 44 | — | Yellow | UEFA Euro qualification 2007 |
| 16 Aug 2006 | v Netherlands | 0–4 | came on 46′ | 44 | — | — | Friendly |
| 24 May 2006 | v Chile | 0–1 | started | 90 | — | — | Friendly |
| 1 Mar 2006 | v Sweden | 3–0 | came on 61′ | 29 | 1 | — | Friendly |
| 17 Aug 2005 | v Italy | 1–2 | came on 78′ | 12 | — | — | Friendly |
| 29 Mar 2005 | v China PR | 1–0 | came on 45′ | 45 | — | — | Friendly |
| 9 Feb 2005 | v Portugal | 1–0 | came on 69′ | 21 | — | — | Friendly |
| 16 Nov 2004 | v Croatia | 1–0 | started | 90 | — | — | Friendly |
| 13 Oct 2004 | v Faroe Islands | 2–0 | came on 56′ | 34 | — | — | FIFA World Cup qualification 2004 |
| 18 Aug 2004 | v Bulgaria | 1–1 | started, off 52′ | 52 | — | — | Friendly |
| 29 May 2004 | v Nigeria | 0–3 | started | 90 | — | — | Unity Cup 2004 |
| 27 May 2004 | v Romania | 1–0 | started | 90 | — | — | Friendly |
| 28 Apr 2004 | v Poland | 0–0 | started | 90 | — | — | Friendly |
| 31 Mar 2004 | v Czech Republic | 2–1 | came on 70′ | 20 | — | — | 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.