| Competition: | Irish League |
| Season: | 1979–80 |
| Winners: | Linfield 33rd Irish title |
| Matches: | 132 |
| Total Goals: | 399 |
| League Topscorer: | Jimmy Martin (17) |
| Prevseason: | 1978–79 |
| Nextseason: | 1980–81 |
The 1979–80 Irish League was the 79th edition of the Irish League, the highest level of league competition in Northern Irish football. The league consisted of 12 teams, and Linfield won the championship.