1989–90 Eastern Counties Football League

The 1989–90 season was the 48th in the history of Eastern Counties Football League a football competition in England.

Sudbury Town were champions for the second time in a row, winning their seventh Eastern Counties Football League title and were promoted to the Southern Football League for the first time in their history.

Premier Division
The Premier Division featured 19 clubs which competed in the division last season, along with two new clubs, promoted from Division One:
 * Halstead Town
 * Wroxham

Division One
Division One featured twelve clubs which competed in the division last season, along with five new clubs:
 * Cornard United, joined from the Essex and Suffolk Border League
 * Ely City, relegated from the Premier Division
 * Norwich United, joined from the Anglian Combination
 * Soham Town Rangers, relegated from the Premier Division
 * Woodbridge Town, joined from the Suffolk and Ipswich League

Also, Loadwell Ipswich changed name to Ipswich Wanderers.