1970–71 Sussex County Football League

The 1970–71 Sussex County Football League season was the 46th in the history of Sussex County Football League a football competition in England.

Division One
Division One featured 14 clubs which competed in the division last season, along with two new clubs, promoted from Division Two:
 * APV Athletic
 * Lancing

Division Two
Division Two featured 13 clubs which competed in the division last season, along with three new clubs:
 * Bognor Regis Town, relegated from Division One
 * Pagham, joined from the West Sussex League
 * Wadhurst, relegated from Division One