2021–22 Essex Senior Football League

The 2021–22 season was the 51st in the history of the Essex Senior Football League, a football competition in England.

The proposed constitution for this season was published on 22 May 2021, based on allocations for Steps 5 and 6 announced by the FA five days earlier, and it was subject to appeal. The constitution was ratified at the league's annual general meeting (AGM) on 24 June.

After the abandonment of the 2019–20 and 2020–21 seasons due to the COVID-19 pandemic in England, numerous promotions were decided on a points per game basis over the previous two seasons.

The league featured 16 clubs which competed in the division last season, along with five new clubs. Cockfosters were initially moved to the Spartan South Midlands League, but they won their appeal and the transfer was reversed.
 * Promoted from the Eastern Counties League Division One South:
 * Athletic Newham
 * Little Oakley
 * White Ensign
 * Transferred from the Eastern Counties League Premier Division:
 * FC Clacton
 * Stanway Rovers

Walthamstow were champions, winning their first Essex Senior League title and were promoted to the Southern League. Runners-up Saffron Walden Town lost interstep playoff match.