| Competition: | Irish League |
| Season: | 1903–04 |
| Winners: | Linfield 7th Irish title |
| Matches: | 56 |
| Total Goals: | 200 |
| Prevseason: | 1902–03 |
| Nextseason: | 1904–05 |
The 1903–04 Irish League was the 14th edition of the Irish League, the highest level of league competition in Irish football.
The league comprised 8 teams, and Linfield won the championship.