The 2017–18 Spartan South Midlands Football League season was the 21st in the history of Spartan South Midlands Football League, a football competition in England.
[1] Following a few amendments, the constitution for the Spartan South Midlands League was ratified at the league's AGM on 24 June 2017.
[2] The Premier Division featured 20 clubs which competed in the division last season, along with two clubs, promoted from Division One:
Division One featured 20 clubs in the division for this season, of which there are five new clubs:
Division Two featured 14 clubs which competed in the division last season, along with three new clubs: