Mira Loma Prison Complex, California

Around 3,485 people are incarcerated within the walls that surround this square-mile block, west of Lancaster. California State Prison, Los Angeles County has a design capacity of around 2,300 inmates, and generally houses around 3,485 (2015). Another facility here, The Mira Loma Detention Center, was a Los Angeles County facility that was used to hold immigration detainees for Immigration and Customs Enforcement (ICE), until its closure in 2012.