The 1939–40 season was Port Vale's 34th season of football in the Football League, and second successive season in the Third Division South. All competitive football was suspended upon the breakout of war in Europe, just two games into the regular season. These two games were expunged form official records and the regional war leagues which replaced them are not recognised by the Football League and thus not included in official records. Port Vale went on to finish eighth in the West League of the regional wartime league.