Folsom State Prison is a California State Prison in Folsom, California, U.S., approximately 20mi northeast of the state capital of Sacramento. It is one of 33 prisons operated by the California Department of Corrections and Rehabilitation.Opened in 1880, Folsom is the state's second-oldest prison, after San Quentin, and the first in the United States to have electricity. Folsom was also one of the first maximum security prisons, and as such witnessed the execution of 93 condemned prisoners over a 42-year period.Folsom is probably best known in popular culture for concerts performed at the facility by musician Johnny Cash, particularly in 1968, when the two shows of January 13 were made into a live album. He had written and recorded the song "Folsom Prison Blues" over a decade earlier.FacilitiesBoth FSP and California State Prison, Sacramento (SAC) share the mailing address: Represa, CA 95671. Represa (translated as "dam" from the Spanish language) is the name given in 1892 to the State Prison post office because of its proximity to a dam on the American River that was under construction at the time. The dam was replaced in 1955 by the Folsom Dam.