1930–31 League of Ireland
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.
Overview
Two new teams were elected to the League: Dolphin and Waterford.Fordsons changed their name to Cork. Dundalk dropped their 'G.N.R.' moniker.
Teams
| Team | Location | Stadium |
| Bohemians | Dublin | Dalymount Park |
| Bray Unknowns | Bray | Woodbrook Ground |
| Brideville | Dublin | Richmond Park |
| Cork | Cork | Mardyke |
| Dolphin | Dublin | Dolphin Park |
| Drumcondra | Dublin | Clonturk Park |
| Dundalk | Dundalk | Athletic Grounds |
| Jacobs | Dublin | Rutland Avenue |
| St. James's Gate | Dublin | St. James's Park |
| Shamrock Rovers | Dublin | Glenmalure Park |
| Shelbourne | Dublin | Shelbourne Park |
| Waterford | Waterford | Kilcohan Park |