The 2009–10 season was the 39th in the history of Essex Senior Football League a football competition in England.[1]
The league featured 15 clubs which competed in the league last season, along with three new clubs:
Also, Mauritius Sports & Pennant changed name to Mauritius Sports Association.
Stansted were champions, winning their first Essex Senior League title, but were not promoted due to ground grading requirements.
| Competition: | Essex Senior Football League |
| Season: | 2009–10 |
| Winners: | Stansted |
| Matches: | 306 |
| Total Goals: | 1035 |
| Prevseason: | 2008–09 |
| Nextseason: | 2010–11 |