The Spartan South Midlands Football League is an English football league covering Hertfordshire, northwest Greater London, central Buckinghamshire and southern Bedfordshire.

The Premier Division is at step 5 (or level 9) and Division One at step 6 (level 10) of the National League System (NLS) respectively.

It is also known as the Molten Spartan South Midlands Football League after its sponsors.

The top and bottom tier were split geographically into North and South Sections.

In 1998, the geographic sections were abolished, and a simple three-tier structure with promotion and relegation between the divisions was introduced.