1925–26 FAI Cup
The FAI Cup 1925-26 was the fifth edition of Ireland's premier cup competition, The Football Association of Ireland Challenge Cup or FAI Cup. The tournament began on 9 January 1926 and concluded on 17 March with the final held at Dalymount Park, Dublin. An official attendance of 25,000 people watched inspirational goalkeeper Bill O'Hagan guide Fordsons to their first and only FAI Cup title by defeating the defending champions Shamrock Rovers.
First round
| Tie no | Home team | Score | Away team | Date |
| 1 | Athlone Town | 4-0 | Brideville | 9 January 1926 |
| 2 | Bohemians | 0-0 | Shamrock Rovers | 9 January 1926 |
| replay | Shamrock Rovers | 2-2 | Bohemians | 16 January 1926 |
| replay | Shamrock Rovers | 2-0 | Bohemians | 20 January 1926 |
| 3 | Bray Unknowns | 5-2 | St James's Gate | 9 January 1926 |
| 4 | Fordsons | 2-2 | Shelbourne | 9 January 1926 |
| replay | Shelbourne | 1-2 | Fordsons | 16 January 1926 |
| 5 | Lindon | 4-2 | Pioneers | 9 January 1926 |
| 6 | Jacobs | 5-1 | Barrackton United | 10 January 1926 |
Second round
| Tie no | Home team | Score | Away team | Date |
| 1 | Lindon | 1-1 | Jacobs | 23 January 1926 |
| replay | Jacobs | 4-2 | Lindon | 31 January 1926 |
| 2 | Athlone Town | 2-3 | Fordsons | 24 January 1926 |
| Bye | Bray Unknowns |
| Bye | Shamrock Rovers |
Semi-finals
----Replay
Final
| Winner of FAI Cup 1925-26 |
| Fordsons 1st Title |