Källtorpssjön is a lake in Stockholm County, Södermanland, Sweden.

Källtorpssjön
View of lake
Location of lake
Location of lake
Källtorpssjön
Coordinates59°17′33.1″N 18°09′48.4″E / 59.292528°N 18.163444°E / 59.292528; 18.163444
Basin countriesSweden