| Competition: | League of Ireland |
| Season: | 1930–31 |
| Winners: | Shelbourne (3rd title) |
| League Topscorer: | Alexander Hair (29 goals) |
| Matches: | 132 |
| Total Goals: | 544 |
| Prevseason: | 1929–30 |
| Nextseason: | 1931–32 |
The 1930–31 League of Ireland was the tenth season of the League of Ireland. Bohemians were the defending champions.
Shelbourne won their third title.
Two new teams were elected to the League: Dolphin and Waterford.
Fordsons changed their name to Cork. Dundalk dropped their 'G.N.R.' moniker.
| Team | Location | Stadium | |
|---|---|---|---|
| Dublin (Phibsborough) | Dalymount Park | ||
| Woodbrook Ground | |||
| Dublin (The Liberties) | Richmond Park | ||
| Cork | Cork | Mardyke | |
| Dolphin | Dublin (Dolphin's Barn) | Dolphin Park | |
| Dublin (Clonturk) | Clonturk Park | ||
| Athletic Grounds | |||
| Dublin (Crumlin) | Rutland Avenue | ||
| Dublin (Crumlin) | St. James's Park | ||
| Dublin (Milltown) | Glenmalure Park | ||
| Dublin (Ringsend) | Shelbourne Park | ||
| Waterford | Waterford | Kilcohan Park |