| Competition: | Irish League |
| Season: | 1911–12 |
| Winners: | Glentoran 4th Irish title |
| Matches: | 56 |
| Total Goals: | 182 |
| Prevseason: | 1910–11 |
| Nextseason: | 1912–13 |
The 1911–12 Irish League was the 22nd edition of the Irish League, the highest level of league competition in Irish football.
The league comprised 8 teams, and Glentoran won the championship.