The 1984–85 Northern Football League season was the 87th in the history of Northern Football League, a football competition in England.[1]
| Competition: | Northern Football League Division One |
| Season: | 1984–85 |
| Winners: | Bishop Auckland |
| Relegated: | Horden Colliery Welfare Shildon |
| Matches: | 306 |
| Total Goals: | 973 |
| Prevseason: | 1983–84 |
| Nextseason: | 1985–86 |
Division One featured 16 clubs which competed in the division last season, along with two new clubs, promoted from Division Two:
| Competition: | Northern Football League Division Two |
| Season: | 1984–85 |
| Winners: | Brandon United |
| Promoted: | Brandon United Bedlington Terriers Hartlepool United reserves Billingham Town |
| Matches: | 306 |
| Total Goals: | 1056 |
| Prevseason: | 1983–84 |
| Nextseason: | 1985–86 |
Division Two featured 16 clubs which competed in the division last season, along with two new clubs, relegated from Division One: