The 1889–90 Northern Football League season was the inaugural season in the history of the Northern Football League, a football competition in Northern England.
| Competition: | Northern League |
| Season: | 1889–90 |
| Winners: | Darlington St. Augustines |
| Matches: | 90 |
| Total Goals: | 376 |
| Nextseason: | 1890–91 |
The league featured 10 clubs.