The 1903–04 Northern Football League season was the fifteenth in the history of the Northern Football League, a football competition in Northern England.
| Competition: | Northern League |
| Season: | 1903–04 |
| Winners: | Newcastle United A |
| Matches: | 156 |
| Total Goals: | 608 |
| Prevseason: | 1902–03 |
| Nextseason: | 1904–05 |
The league featured 13 clubs which competed in the last season, no new clubs joined the league this season.