The 2002–03 Sussex County Football League season was the 78th in the history of Sussex County Football League a football competition in England.
[1][2] Division One featured 18 clubs which competed in the division last season, along with two new clubs, promoted from Division Two: Division Two featured 14 clubs which competed in the division last season, along with four new clubs.
Division Three featured eleven clubs which competed in the division last season, along with four new clubs: Also, Bexhill Town changed name to Bexhill United.