1979–80 Essex Senior Football League

The 1979–80 season was the ninth in the history of Essex Senior Football League, a football competition in England.

The league featured 14 clubs which competed in the league last season, along with two new clubs:
 * East Thurrock United, transferred from the London Spartan League
 * Wivenhoe Town, joined from the Essex and Suffolk Border League

Basildon United were champions, winning their fourth Essex Senior League title in a row.