1986–87 Eastern Counties Football League

The 1986–87 season was the 45th in the history of Eastern Counties Football League a football competition in England.

The league featured 22 clubs which competed in the league last season, along with one new club:
 * Watton United, joined from the Anglian Combination

Sudbury Town were champions for the second season in a row, winning their fifth Eastern Counties Football League title, while Bury Town, who finished third were promoted to the Southern Football League, returning after eleven seasons in the Eastern Counties League.