California Control Units Statistics
People in long-term isolation in California: 13822
Percent of prisoners in isolation in California: 7%
Very Complete Good Incomplete
Have stats to contribute?
Control Unit Populations by Nationality

California Men's Colony

*Estimated in 2009

California State Prison, Corcoran

*Estimated in 2008

California State Prison, Los Angeles County

*Estimated in 2013

High Desert Detention Center

*Estimated in 2014

High Desert State Prison

*Estimated in 2010

Martinez Detention Facility - Contra Costa County Jail

*Estimated in 2014

Pelican Bay State Prison

*Estimated in 2014

Richard J. Donovan Correctional Facility at Rock Mountain

*Estimated in 2011

CA Facilities with Control Units

Facility Year Isolation Population Total Population Capacity Isolation Opened Type of Isolation
Avenal State Prison 2008 100c 7525 2920 ? ASU
Bryant Street Jail 2008 90c ? ? ? ASU
California Correctional Institution 2008 1488c 5907 2781 ? 703 SHU, 775 levIV apr08
California Health Care Facility 2014 500e ? ? 2013 ?
California Institution for Women 2008 8c 2443 1026 ? CTC
California Men's Colony 2009 330e ? ? 1999 AdSeg
California Men's Colony 2009 30e ? ? 1989 AdSeg Central
California State Prison, Corcoran 2017 1200e ? ? ? Ad-Seg and SHU, just 4A unit now
California State Prison, Corcoran 2008 1918c 4867 2916 2000 522 levIV, 1388 SHU, 8 PHU apr 0
California State Prison, Los Angeles County 2013 200c ? 200 1993 ASU #1 and #2 (100 each)
California State Prison, Los Angeles County 2013 138c ? 200 2005 A-5 Ad-Seg (CCCMS)
California State Prison, Los Angeles County 2013 104c ? 200 2000 A-4 Ad-Seg (EOP) capacity is 200
California State Prison, Los Angeles County 2013 28c ? 32 2013 B-1 Ad-Seg(Overflow)
California State Prison, Los Angeles County 2013 600c 4764 800 1993 ASU units 1 and 2, Ad-Seg CCCMS
California State Prison, Los Angeles County 2008 150c 4764 1350 ? ASU
Facility Year Isolation Population Total Population Capacity Isolation Opened Type of Isolation
California State Prison, Sacramento 2008 203c 4023 2065 ? ASU pop apr08
California State Prison, Sacramento 2008 563c 3254 2031 ? 238 ASU, 110ASU EOP, 189 PSU, 15
California State Prison, Solano 2008 400c 6047 2610 ? ASU
California Substance Abuse Treatment Facility and State Prison 2008 325c 7628 3424 ? ASU pop 06
Calipatria State Prison 2008 3984c 4168 2208 ? levIV apr08
Centinela State Prison 2008 350c 4928 2383 ? ASU pop apr08, 175 cap
High Desert Detention Center 2014 16e ? ? 2014 Administrative Segregation
High Desert State Prison 2010 187c ? ? 2006 ?
High Desert State Prison 2008 394c 4792 2452 ? 394 ASU pop apr08, 343 cap +? le
Kern Valley State Prison 2015 264c 3700 2470 2005 Ad-Seg
Kern Valley State Prison 2008 407c 5013 2448 2000 ASU pop apr08
Facility Year Isolation Population Total Population Capacity Isolation Opened Type of Isolation
Martinez Detention Facility - Contra Costa County Jail 2014 265e ? ? 1982 Modules A,D,F,M and Q
Martinez Detention Facility - Contra Costa County Jail 2017 53e ? ? ? Ad-Seg D-Module
Mule Creek State Prison 2008 993c 3599 1594 ? levIV
Pelican Bay State Prison 2014 1100e ? ? 1989 Security Housing Units and Commu
Pelican Bay State Prison 2010 ? ? ? 1989 ?
Pelican Bay State Prison 2008 1250c 3461 2280 2000 SHU apr08
Pleasant Valley State Prison 2008 500c 5188 2616 ? levIV
Richard J. Donovan Correctional Facility at Rock Mountain 2017 137c 4500 2408 ? ASU Bldg #6 (EOP)
Richard J. Donovan Correctional Facility at Rock Mountain 2017 63c 4500 2408 ? ASU Bldg #7 (GP)
Richard J. Donovan Correctional Facility at Rock Mountain 2011 500e 4750 ? 1988 ASU Building 6 & 7
Richard J. Donovan Correctional Facility at Rock Mountain 2010 400e ? ? ? Administrative Segregation
Richard J. Donovan Correctional Facility at Rock Mountain 2008 468c 4770 2208 ? levIV
Salinas Valley State Prison 2008 100c 4555 2224 ? 100 ASU cap +? SVPP level IV (83
Valley State Prison 2008 15c 4325 2004 ? condemned
Valley State Prison 2008 141c 3810 2024 ? 68 ASU + 73 SHU pops apr08

c = counted

e = estimated