The Södermanlands Fotbollförbund (Södermanland Football Association) is one of the 24 district organisations of the Swedish Football Association.

It administers lower tier football in the historical province of Södermanland.

[1] Södermanlands Fotbollförbund, commonly referred to as Södermanlands FF, is the governing body for football in Södermanland County and some municipalities in the southern peripherical part of Stockholm County.

The Association was founded on 25 March 1917 and currently has 139 member clubs.

Based in Eskilstuna, the Association's Chairman is Lars Wessman.