The 2012–13 season was the 42nd in the history of Essex Senior Football League a football competition in England.
The league featured 17 clubs which competed in the league last season, along with two new clubs: Burnham Ramblers were champions, winning their first Essex Senior League title and were promoted to the Isthmian League along with runners-up Barkingside.
Both clubs never played in the Isthmian League previously.