| Competition: | Irish League |
| Season: | 1930–31 |
| Winners: | Glentoran 8th Irish title |
| Matches: | 182 |
| Total Goals: | 882 |
| League Topscorer: | Fred Roberts (55) |
| Prevseason: | 1929–30 |
| Nextseason: | 1931–32 |
The 1930–31 Irish League was the 37th edition of the Irish League, the highest level of league competition in Northern Irish football. The league comprised 14 teams, with Glentoran winning the championship.