Florida State Prison (FSP), otherwise known as Raiford Prison, is a correctional institution located in unincorporated Bradford County, Florida.. It was formerly known as the "Florida State Prison-East Unit" as it was originally part of Florida State Prison in Raiford, Florida (now known as Union Correctional Institution). The facility, a part of the Florida Department of Corrections, is located on State Road 16 right across the border from Union County. The institution opened in 1961, even though construction was not completed until 1968. With a maximum population of over 1,400 inmates, FSP is one of the largest prisons in the state. FSP houses one of the state's three death row cell blocks, and the state's execution chamber. Union Correctional Institution also houses male death row inmates while Lowell Annex houses female death row inmates.