The Folsom Powerhouse State Historic Park is a historic site and state park in Folsom, California. It is best known and established for the preservation of the historic Folsom Powerhouse.

Built in 1895 by the Natoma Water and Mining Company with the use of prison labor from the Folsom Prison, the Folsom Powerhouse is a National Historic Landmark and is listed on the National Register of Historic Places. It is also a State Historic Site. The plant operated from its completion up to 1952 when it was donated to the state.

The Folsom Powerhouse State Historic Park preserves the history of the site and the area. Visitors can view the historic structure and learn more about it. It is also an excellent recreation area with amenities for fishing and picnicking.