2003–04 Essex Senior Football League

The 2003–04 season was the 33rd in the history of Essex Senior Football League a football competition in England.

The league featured 15 clubs which competed in the league last season, along with one new club:
 * London APSA, joined from the Essex Business Houses League

Concord Rangers were champions, winning their second Essex Senior League title, while Ilford were promoted to the Isthmian League.