The 2004–05 season was the 34th 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, no new clubs joined the league this season. Though, Bowers United merged with Pitsea, renaming to Bowers & Pitsea, whilst Brentwood changed name to Brentwood Town.
Enfield Town were champions, winning their second Essex Senior League title and were promoted to the Southern League to the same division with original Enfield.
| Competition: | Essex Senior Football League |
| Season: | 2004–05 |
| Winners: | Enfield Town |
| Promoted: | Enfield Town |
| Matches: | 210 |
| Total Goals: | 707 |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |