2004–05 Eastern Counties Football League

The 2004–05 season was the 63rd in the history of Eastern Counties Football League a football competition in England.

AFC Sudbury were champions, winning their fifth Eastern Counties Football League title in a row after the new club was formed in 1999.

Premier Division
The Premier Division featured 19 clubs which competed in the division last season, along with three new clubs, promoted from Division One:
 * Cambridge City reserves
 * Harwich & Parkeston
 * Leiston

Division One
Division One featured 16 clubs which competed in the division last season, along with four new clubs:
 * Fakenham Town, relegated from the Premier Division
 * Saffron Walden Town, returned to league system after leaving Essex Senior League in 2003
 * Tiptree United, relegated from the Premier Division
 * Walsham-le-Willows, joined from the Suffolk and Ipswich League