The 1989–90 Sussex County Football League season was the 65th in the history of Sussex County Football League a football competition in England.
Division One
Division One featured 16 clubs which competed in the division last season, along with two new clubs, promoted from Division Two: Ringmer Seaford Town
Also, Haywards Heath changed name to Haywards Heath Town.
League table
Division Two
Division Two featured eleven clubs which competed in the division last season, along with five new clubs. Clubs relegated from Division One: Oakwood Portfield Clubs promoted from Division Three: Franklands Village Saltdean United Stamco
League table
Division Three
Division Three featured ten clubs which competed in the division last season, along with four new clubs: Buxted East Grinstead, relegated from Division Two Town Mead Withdean
Also, Falcons changed name to Rottingdean.
League table
References