1911–12 Irish League
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 eight teams, and Glentoran won the championship for the 4th time.
Season summary
Bohemians, who had been members of the league since 1902, withdrew for this season. Their place was taken by Irish Junior League champions Glenavon, who became the first Irish League team from outside a city in Ireland.Teams and locations
| Team | Town | Home Ground |
| Belfast Celtic | Belfast | Celtic Park |
| Cliftonville | Belfast | Solitude |
| Derry Celtic | Derry | Brandywell |
| Distillery | Belfast | Grosvenor Park |
| Glenavon | Lurgan | Mourneview Park |
| Glentoran | Belfast | The Oval |
| Linfield | Belfast | Windsor Park |
| Shelbourne | Dublin | Sandymount Road |