2004 FAI Cup
The FAI Cup 2004 was the 84th staging of The Football Association of Ireland Challenge Cup or Carlsberg FAI Cup. It officially kicked off in late May, when twenty clubs from the junior and intermediate leagues battled it out for the chance to face League of Ireland opposition in the second round. The ten winners of those ties were joined in the second round by the 22 eircom League of Ireland clubs. The competition ran until October, with the final taking place on Sunday, October 24.
First round
Matches played on the weekend of Sunday, 23 May 2004.| Tie no | Home team | Score | Away team |
| 1 | Belgrove | 0–1 | Leeds A.F.C. |
| 2 | Carrick United | 3–2 | Bluebell United |
| 3 | Cherry Orchard | 1–2 | Glebe North |
| 4 | Drumcondra A.F.C. | 1–1 | Letterkenny Rovers |
| replay | Letterkenny Rovers | 0–2 | Drumcondra A.F.C. |
| 5 | Fairview Rangers | 0–2 | Wayside Celtic |
| 6 | Freebooters | 3–3 | Portmarnock |
| replay | Portmarnock | w/o | Freebooters |
| 7 | Moyle Park College | 1–1 | Quay Celtic |
| replay | Quay Celtic | 2–1 | Moyle Park College |
| 8 | Ringmahon Rangers | 3–0 | CYM Terenure |
| 9 | Rockmount | 2–2 | College Corinthians |
| replay | College Corinthians | 2–3 | Rockmount |
| 10 | Tullamore | 1–1 | Bangor Celtic |
| replay | Bangor Celtic | 0–1 | Tullamore |
Second round
Matches played on the weekend of Sunday, 25 July 2004.| Tie no | Home team | Score | Away team |
| 1 | Rockmount | 3–1 | Portmarnock |
| 2 | Waterford United | 2–1 | Sligo Rovers |
| 3 | Shamrock Rovers | 3–0 | Carrick United |
| 4 | Shelbourne | 4–1 | Finn Harps |
| 5 | St Patrick's Athletic | 4–1 | Wayside Celtic |
| 6 | Cobh Ramblers | 3–3 | Limerick |
| replay | Limerick | 2–2 | Cobh Ramblers |
| 7 | Leeds A.F.C. | 0–3 | Longford Town |
| 8 | Monaghan United | 1–0 | Dublin City |
| 9 | Bray Wanderers | 0–2 | Kilkenny City |
| 10 | Athlone Town | 3–0 | Tullamore |
| 11 | Galway United | 0–1 | Derry City |
| 12 | Bohemians | 8–0 | Ringmahon Rangers |
| 13 | Kildare County | 4–0 | Glebe North |
| 14 | Dundalk | 0–0 | Drogheda United |
| replay | Drogheda United | 3–2 | Dundalk |
| 15 | Quay Celtic | 3–4 | Drumcondra |
| 16 | UCD | 1–0 | Cork City |
Third round
Matches played on the week of Monday, 16 August 2004.| Tie no | Home team | Score | Away team |
| 1 | Shelbourne | 1–1 | Derry City |
| replay | Derry City | 0–0 | Shelbourne |
| 2 | UCD | 5–0 | Drumcondra |
| 3 | Waterford United | 7–2 | Kilkenny City |
| 4 | Bohemians | 0–1 | Kildare County |
| 5 | Athlone Town | 1–0 | Cobh Ramblers |
| 6 | Drogheda United | 2–0 | St Patrick's Athletic |
| 7 | Longford Town | 1–1 | Shamrock Rovers |
| replay | Shamrock Rovers | 0–1 | Longford Town |
| 8 | Rockmount | 2–0 | Monaghan United |
Quarter-finals
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Replays
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Semi-finals
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Final
| Winner of FAI Cup 2004 |
Longford Town 2nd Title |