California State Prison, Sacramento is a male-only state prison located in the city of Folsom, in Sacramento County, California. The facility is also referenced as Sacramento State Prison, CSP-Sacramento, CSP-SAC, and occasionally, New Folsom or New Folsom Prison which was its official name prior to October 1992. Because the facility is adjacent to Folsom State Prison, both SAC and FSP share the mailing address: Represa, CA 95671.