The 1989–90 Northern Counties East Football League season was the 8th in the history of Northern Counties East Football League, a football competition in England.
| Competition: | Northern Counties East Football League Premier Division |
| Season: | 1989–90 |
| Winners: | Bridlington Town |
| Promoted: | Bridlington Town |
| Relegated: | Sheffield Hallam Grimethorpe Miners Welfare Hatfield Main |
| Matches: | 306 |
| Total Goals: | 921 |
| Prevseason: | 1988–89 |
| Nextseason: | 1990–91 |
The Premier Division featured 15 clubs which competed in the previous season, along with three new clubs:
| Competition: | Northern Counties East Football League Division One |
| Season: | 1989–90 |
| Winners: | Rowntree Mackintosh |
| Promoted: | Maltby Main Ossett Town |
| Relegated: | Immingham Town Kiveton Park Rowntree Mackintosh |
| Matches: | 210 |
| Total Goals: | 619 |
| Prevseason: | 1988–89 |
| Nextseason: | 1990–91 |
Division One featured 13 clubs which competed in the previous season, along with two new clubs, promoted from Division Two:
| Competition: | Northern Counties East Football League Division Two |
| Season: | 1989–90 |
| Winners: | Winterton Rangers |
| Promoted: | Winterton Rangers Selby Town Yorkshire Main Glasshoughton Welfare |
| Matches: | 182 |
| Total Goals: | 519 |
| Prevseason: | 1988–89 |
| Nextseason: | 1990–91 |
Division One featured 12 clubs which competed in the previous season, along with two new clubs, relegated from Division One: