| FAI Cup | |
| Year: | 2005 |
| Other Titles: | FAI Ford Cup |
| Country: | Republic of Ireland |
| Champions: | Drogheda United |
| Runner-Up: | Cork City F.C. |
| Prevseason: | 2004 |
| Nextseason: | 2006 |
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.
Fixtures played weekend April 24
Lissadel United 3-0 Rockmount
Cherry Orchard 0-0 Belgrove
Bangor Celtic 1-2 Wayside Celtic
Douglas Hall 2-0 Moyle Park
Mount Merrion 2-2 Galway Hibernians
St Peter's (Athlone) 0-0 Carew Park
Waterford Crystal 2-0 Bonagee United
Westport United 1-2 Fanad United
Malahide United 3-2 Glenmore / Dundrum
Belgrove 1-2 Cherry Orchard
Galway Hibernians 0-0 Mount Merrion (3-0 pen)
Carew Park 3-2 St Peter's, Athlone
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 |
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 |
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See main article: 2005 FAI Cup Final.