The 1982–83 season was the 68th season of the Isthmian League, an English football competition.
Wycombe Wanderers were champions, winning their seventh Isthmian League title.
Worthing finished second in Division One achieving the second promotion in a row.
The Premier Division consisted of 22 clubs, including 20 clubs from the previous season and two new clubs, promoted from Division One: At the end of the season Leytonstone & Ilford changed name into Leytonstone/Ilford.
Division Two consisted of 22 clubs, including 18 clubs from the previous season and four new teams: Two clubs relegated from Division One: Two clubs joined from the Athenian League: At the end of the season Dorking Town were renamed Dorking.