The 1976–77 Sussex County Football League season was the 52nd in the history of Sussex County Football League a football competition in England.[1] [2]
| Competition: | Sussex County Football League Division One |
| Season: | 1976–77 |
| Winners: | Eastbourne Town |
| Relegated: | Three Bridges Whitehawk |
| Matches: | 240 |
| Total Goals: | 702 |
| Prevseason: | 1975–76 |
| Nextseason: | 1977–78 |
Division One featured 13 clubs which competed in the division last season, along with three new clubs:
| Competition: | Sussex County Football League Division Two |
| Season: | 1976–77 |
| Winners: | Shoreham |
| Promoted: | Shoreham Arundel |
| Matches: | 182 |
| Total Goals: | 582 |
| Prevseason: | 1975–76 |
| Nextseason: | 1977–78 |
Division Two featured eleven clubs which competed in the division last season, along with three new clubs:
Also, Hastings & St Leonards changed name to Hastings Town.