The 1986–87 Sussex County Football League season was the 62nd in the history of Sussex County Football League a football competition in England.[1] [2]
| Competition: | Sussex County Football League Division One |
| Season: | 1986–87 |
| Winners: | Arundel |
| Relegated: | Chichester City Midhurst & Easebourne |
| Matches: | 240 |
| Total Goals: | 762 |
| Prevseason: | 1985–86 |
| Nextseason: | 1987–88 |
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: | 1986–87 |
| Winners: | Pagham |
| Promoted: | Pagham Selsey |
| Relegated: | Franklands Village Sidley United |
| Matches: | 240 |
| Total Goals: | 694 |
| Prevseason: | 1985–86 |
| Nextseason: | 1987–88 |
Division Two featured 13 clubs which competed in the division last season, along with three new clubs:
Also, Albion United changed name to Little Common Albion.
| Competition: | Sussex County Football League Division Three |
| Season: | 1986–87 |
| Winners: | Langney Sports |
| Promoted: | Langney Sports Crowborough Athletic |
| Matches: | 182 |
| Total Goals: | 667 |
| Prevseason: | 1985–86 |
| Nextseason: | 1987–88 |
Division Three featured 13 clubs which competed in the division last season, along with one new club: