2005 FAI Cup
The FAI Cup 2005 was the 85th staging of The Football Association of Ireland Challenge Cup or FAI Cup. It officially kicked off in late April, 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 early December, with the final taking place on Sunday, December 4.
First round
Matches played on the weekend of Saturday, 24 April 2005.| Tie no | Home team | Score | Away team |
| 1 | Lissadel United | 3–0 | Rockmount |
| 2 | St Mary's | 1–4 | Avondale United |
| replay | Cherry Orchard | 0–0 | Belgrove |
| 3 | Belgrove | 1–2 | Cherry Orchard |
| 4 | Bangor Celtic | 1–2 | Wayside Celtic |
| 5 | Douglas Hall | 2–0 | Moyle Park |
| 6 | Mount Merrion | 2–2 | Galway Hibernians |
| replay | Galway Hibernians | 0–0 | Mount Merrion |
| 7 | St Peter's | 0–0 | Carew Park |
| replay | Carew Park | 3–2 | St Peter's, Athlone |
| 8 | Waterford Crystal | 2–0 | Bonagee United |
| 9 | Westport United | 1–2 | Fanad United |
| 10 | Malahide United | 3–2 | Glenmore / Dundrum |
Second round
Matches played on the weekend of Sunday, 12 June 2005.| Tie no | Home team | Score | Away team |
| 1 | UCD | 2–0 | Dublin City |
| 2 | Shelbourne | 0–2 | Derry City |
| 3 | Drogheda United | 2–0 | Limerick |
| 4 | Waterford United | 0–1 | St Patrick's Athletic |
| 5 | Bohemians | 2–0 | Athlone Town |
| 6 | Galway United | 0–0 | Cork City |
| replay | Cork City | 1–0 | Galway United |
| 7 | Avondale United | 0–1 | Bray Wanderers |
| 8 | Carew Park | 1–3 | Douglas Hall |
| 9 | Kilkenny City | 0–1 | Finn Harps |
| 10 | Sligo Rovers | 1–1 | Malahide United |
| replay | Malahide United | 0–2 | Sligo Rovers |
| 11 | Kildare County | 4–1 | Galway Hibernians |
| 12 | Longford Town | 5–0 | Waterford Crystal |
| 13 | Cobh Ramblers | 0–1 | Wayside Celtic |
| 14 | Lissadel United | 0–4 | Cherry Orchard |
| 15 | Shamrock Rovers | 2–0 | Fanad United |
| 16 | Monaghan United | 1–7 | Dundalk |
Third round
Matches played on the weekend of Sunday, 28 August 2005.| Tie no | Home team | Score | Away team |
| 1 | Dundalk | 0–2 | Drogheda United |
| 2 | Bray Wanderers | 1–0 | Cherry Orchard |
| 3 | Bohemians | 2–2 | Wayside Celtic |
| replay | Wayside Celtic | 1–2 | Bohemians |
| 4 | Longford Town | 1–1 | UCD |
| replay | UCD | 2–1 | Longford Town |
| 5 | Derry City | 3–1 | Kildare County |
| 6 | Sligo Rovers | 2–1 | St Patrick's Athletic |
| 7 | Shamrock Rovers | 2–0 | Douglas Hall |
| 8 | Cork City | 0–0 | Finn Harps |
| replay | Finn Harps | 2–3 | Cork City |
Quarter-finals
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Semi-finals
----Final
| Winner of FAI Cup 2005 |
| Drogheda United 1st Title |