1965–66 Athenian League

The 1965–66 Athenian League season was the 43rd in the history of Athenian League. The league consisted of 48 teams.

Premier Division
The division featured two new teams, both promoted from last seasons Division One:
 * Slough Town (1.)
 * Hemel Hempstead Town (2.)

Division One
The division featured 3 new teams:
 * 1 relegated from last seasons Premier Division:
 * Redhill (16.)
 * 2 promoted from last seasons Division Two:
 * Harwich & Parkeston (1.)
 * Bishop's Stortford (2.)

Division Two
The division featured 4 new teams:
 * 1 relegated from last seasons Division One:
 * Epsom & Ewell (16.)
 * 3 joined the division:
 * Lewes, from Sussex County League
 * Marlow, from Spartan League
 * Ruislip Manor, from Spartan League