Tallest: 1 · Year
By quarter-hour; stoppage time counts as the 45th or 90th minute.
Tallest: 2 · Minute
Republic of Ireland's matches with known line-ups from their first recorded cap to their last.
| With them | 22 | 11 | 7 | 4 | 32 | 20 | 50% |
| Without them | 25 | 13 | 8 | 4 | 30 | 13 | 52% |
| Victor Onopko | Russia | 3 |
| Adrian Aliaj | Albania | 2 |
| Aleksandr Amisulashvili | Georgia | 2 |
| Alexander Frei | Switzerland | 2 |
| Alexander Kerzhakov | Russia | 2 |
| Alexandr Mostovoi | Russia | 2 |
| Altin Lala | Albania | 2 |
| Altin Rraklli | Albania | 2 |
| Arian Bellai | Albania | 2 |
| Bernt Haas | Switzerland | 2 |
| Malta | 2 | 2 |
| Andorra | 1 | 1 |
| Saudi Arabia | 1 | 1 |
Finals and qualifying campaigns alike.
| 11 Jun 2002 | v Saudi Arabia | 3–0 | 61′ | — | Extended lead | 2–0 | FIFA World Cup 2002 · Group stage |
| 25 Apr 2001 | v Andorra | 3–1 | 73′ | — | Extended lead | 3–1 | FIFA World Cup qualification 2001 |
| 8 Sep 1999 | v Malta | 3–2 | 20′ | — | Extended lead | 2–0 | UEFA Euro qualification 1999 |
| 14 Oct 1998 | v Malta | 5–0 | 82′ | — | Extended lead | 5–0 | UEFA Euro qualification 1998 |
In a recorded line-up, on the scoresheet or booked. “—” where the line-up isn't known.
| 24 May 2006 | v Chile | 0–1 | started | 90 | — | — | Friendly |
| 16 Nov 2004 | v Croatia | 1–0 | started, off 52′ | 52 | — | — | Friendly |
| 18 Aug 2004 | v Bulgaria | 1–1 | came on 45′ | 45 | — | — | Friendly |
| 11 Oct 2003 | v Switzerland | 0–2 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 9 Sep 2003 | v Turkey | 2–2 | started, off 88′ | 88 | — | — | Friendly |
| 6 Sep 2003 | v Russia | 1–1 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 19 Aug 2003 | v Australia | 2–1 | started, off 45′ | 45 | — | — | Friendly |
| 11 Jun 2003 | v Georgia | 2–0 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 7 Jun 2003 | v Albania | 2–1 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 30 Apr 2003 | v Norway | 1–0 | started | 90 | — | — | Friendly |
| 2 Apr 2003 | v Albania | 0–0 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 29 Mar 2003 | v Georgia | 2–1 | started | 90 | — | — | UEFA Euro qualification 2003 |
| 12 Feb 2003 | v Scotland | 2–0 | started, off 90′ | 90 | — | — | Friendly |
| 16 Oct 2002 | v Switzerland | 1–2 | started | 90 | — | — | UEFA Euro qualification 2002 |
| 7 Sep 2002 | v Russia | 2–4 | started | 90 | — | — | UEFA Euro qualification 2002 |
| 21 Aug 2002 | v Finland | 3–0 | started | 90 | — | — | Friendly |
| 16 Jun 2002 | v Spain | 1–1 | started | 120 | — | — | FIFA World Cup 2002 · Round of 16 |
| 11 Jun 2002 | v Saudi Arabia | 3–0 | started | 90 | 1 | — | FIFA World Cup 2002 · Group stage |
| 5 Jun 2002 | v Germany | 1–1 | started | 90 | — | — | FIFA World Cup 2002 · Group stage |
| 1 Jun 2002 | v Cameroon | 1–1 | started | 90 | — | — | FIFA World Cup 2002 · Group stage |
| 17 Apr 2002 | v United States | 2–1 | started, off 71′ | 71 | — | — | Friendly |
| 13 Feb 2002 | v Russia | 2–0 | came on 45′ | 45 | — | — | Friendly |
| 25 Apr 2001 | v Andorra | 3–1 | — | — | 1 | — | FIFA World Cup qualification 2001 |
| 8 Sep 1999 | v Malta | 3–2 | — | — | 1 | — | UEFA Euro qualification 1999 |
| 14 Oct 1998 | v Malta | 5–0 | — | — | 1 | — | UEFA Euro qualification 1998 |
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.