Folsom is a city in Sacramento County, California, United States. It is commonly known for Folsom Prison, the song "Folsom Prison Blues" as well as for Folsom Lake. The population was 72,203 at the 2010 census. The median home price in Folsom is $651,491 with the average household income at $100,163. Folsom is part of the Sacramento−Arden-Arcade−Roseville Metropolitan Statistical Area.