| Competition: | Irish League |
| Season: | 1908–09 |
| Winners: | Linfield 10th Irish title |
| Matches: | 54 |
| Total Goals: | 175 |
| Prevseason: | 1907–08 |
| Nextseason: | 1909–10 |
The 1908–09 Irish League was the 19th edition of the Irish League, the highest level of league competition in Irish football.
The league comprised 8 teams, and Linfield won the championship.