Södertälje Fotbollsklubb, commonly known as Södertälje FK, is a Swedish football club located in Södertälje. The club was formed on 10 September 1907 and currently plays in Division 1, the third tier of Swedish football.

Södertälje FK has won the Swedish Cup once, in 1994, and has also competed in the UEFA Cup Winners' Cup. The club's most famous player is Karl-Erik Grahn, who played for the club in the 1950s and 1960s and was a member of the Swedish national team that won the silver medal at the 1958 FIFA World Cup.

Södertälje FK plays its home matches at Södertälje Fotbollsarena, which has a capacity of 6,700. The club's traditional colors are blue and white.