The 1985–86 season was the 44th in the history of Eastern Counties Football League a football competition in England.[1]
The league featured 22 clubs which competed in the league last season, no new clubs joined the league this season. Sudbury Town were champions, winning their fourth Eastern Counties Football League title.
| Competition: | Eastern Counties Football League |
| Season: | 1985–86 |
| Winners: | Sudbury Town |
| Matches: | 462 |
| Total Goals: | 1534 |
| Prevseason: | 1984–85 |
| Nextseason: | 1986–87 |