2005 League of Ireland Cup
The League of Ireland Cup 2005 was the 32nd staging of the League of Ireland Cup.
The 2005 League Cup kicked off in May. A representative team of the Mayo League joined the 22 league clubs in the draw. There were fourteen clubs drawn to face each other in the first round, with the rest given byes to the second round.
First round
Matches played on 30 May and 31 May 2005.Second round
Matches played between 20 June and 26 June 2005.| Tie no | Home team | Score | Away team |
| 1 | Cork City | 3–0 | Kilkenny City |
| 2 | UCD | 1–0 | Shamrock Rovers |
| 3 | Bohemians | 1–3 | St Patrick's Athletic |
| 4 | Cobh Ramblers | 0–1 | Waterford United |
| 5 | Drogheda United | 2–1 | Monaghan United |
| 6 | Shelbourne | 2–1 | Kildare County |
| 7 | Sligo Rovers | 0–2 | Longford Town |
| 8 | Derry City | 2–1 | Galway United |
Quarter-finals
Matches played on 4 July and 5 July 2005.Semi-finals
----Final
| League of Ireland Cup Winner 2005 |
Derry City 6th Title |