The 2007–08 Serie C1 season was the thirtieth football league season of Italian Serie C1 since its establishment in 1978. It was divided into two phases: the regular season, played from September 2007 to May 2008, and the playoff phase from May to June 2008. The league was composed of 36 teams divided into two divisions of 18 teams each, whose teams were divided mainly according to geographical principles.