The 1984–85 season was the 70th season of the Isthmian League, which is an English football competition featuring semi-professional and amateur clubs from London, East and South East England.
Premier Division
The Premier Division consisted of 22 clubs, including 20 clubs from the previous season and two new clubs, promoted from Division One: • Epsom & Ewell • Windsor & EtonLeague tableStadia and locations ==Division One==
Division One
Division One consisted of 22 clubs, including 18 clubs from the previous season and four new clubs: Two clubs relegated from the Premier Division: • Bromley • Staines Town Two clubs promoted from Division Two: • Basildon United • St Albans CityLeague tableStadia and locations ==Division Two North==