The Spartan League was established in 1907 with six clubs; Bromley, Dulwich Hamlet, Leytonstone, Nunhead, Shepherd's Bush and West Norwood.

[1] It gained five clubs for its second season, and split into two divisions, Eastern and Western.

[1] In 1909–10 the split was changed to Section A and B, before the league reverted to a single division in 1910–11.

[1] This structure remained unchanged until World War II.

[2] The league restarted in 1945 and was divided into three divisions; Central, Eastern and Western.

For the following season, the regional divisions were renamed the Section B and fSection A respectively.