The 1980–81 Sussex County Football League season was the 56th in the history of Sussex County Football League a football competition in England.[1] [2]
| Competition: | Sussex County Football League Division One |
| Season: | 1980–81 |
| Winners: | Pagham |
| Relegated: | Portfield Bexhill Town |
| Matches: | 240 |
| Total Goals: | 684 |
| Prevseason: | 1979–80 |
| Nextseason: | 1981–82 |
Division One featured 14 clubs which competed in the division last season, along with two new clubs, promoted from Division Two:
| Competition: | Sussex County Football League Division Two |
| Season: | 1980–81 |
| Winners: | Whitehawk |
| Promoted: | Whitehawk Hailsham Town |
| Matches: | 182 |
| Total Goals: | 547 |
| Prevseason: | 1979–80 |
| Nextseason: | 1981–82 |
Division Two featured twelve clubs which competed in the division last season, along with two new clubs relegated from Division One: