United States · CA · San Quentin
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From Wikimedia Commons (CC-BY-SA where not otherwise stated).
Photo by Jesstess87 via Wikimedia Commons (CC BY-SA 4.0)
Photo by Unknown authorUnknown author or not provided via Wikimedia Commons (Public domain)
Photo by George Frederick Keller via Wikimedia Commons (Public domain)
Photo by Daderot via Wikimedia Commons (CC0)

Photo by California Department of Corrections via Wikimedia Commons (Public domain)
Photo by The San Francisco Call Bulletin via Wikimedia Commons (Public domain)
Photo by The San Francisco Call Bulletin via Wikimedia Commons (Public domain)
Photo by The San Francisco Call Bulletin via Wikimedia Commons (Public domain)
California adult institution operated by the California Department of Corrections and Rehabilitation. CDCR code: SQRC.
San Quentin Rehabilitation Center (SQ), formerly known as San Quentin State Prison, is a California Department of Corrections and Rehabilitation state prison for men, located north of San Francisco in the unincorporated place of San Quentin in Marin County. Established in 1852, and opening in 1854, San Quentin is the oldest prison in California. The state's only death row for male inmates, the largest in the United States, was located at the prison. Its gas chamber has not been used since 1993, and its lethal injection chamber was last used in 2006. The prison has been featured on film, radio drama, video, podcast, and television; is the subject of many books; has hosted concerts; and has housed many notorious inmates.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
3,082
Current population
3,300
Occupancy
107%
Year opened
1852
Closed 2019
Figures from official sources · verified 29 May 2026 · methodology
Population held
male
Opened
1852
Region
CA
Security level
Maximum
Death-row facility
No
Newly rebranded as a rehabilitation center. Death row population (~600) transferred to other prisons under a 2022 executive order.
Friday-Sunday visits with prior approval via CDCR Visitor Processing. Photo ID required.
Inmate Name, CDCR #, San Quentin Rehabilitation Center, San Quentin, CA 94964.
GTL ConnectNetwork for phone/video. JPay accepted. The San Quentin News is one of the few inmate-run newspapers in the US.
COVID-19 outbreak in 2020 caused 28 inmate deaths; California Court of Appeal called response 'morally indefensible'.

Phillip Carl Jablonski (January 3, 1946 â December 27, 2019) was an American serial killer and rapist convicted of killing five women in California and Utah between 1978 and 1991.


David Esco Welch (born 1957/1958) is an American mass murderer who shot and killed six people during a home invasion of his girlfriend's house in Oakland, California on December 8, 1986. Welch was sentenced to death and remains on death row awaiting execution.

Anthony John Sully (January 2, 1944 â September 8, 2023) was an American serial killer and police officer responsible for the murders of six people between February and August 1983 at his warehouse in Burlingame, California.


Douglas Daniel Clark (March 10, 1948 â October 11, 2023) was an American serial killer and necrophile.
Showing 9 of 12. Source: Wikidata + Wikipedia.
Derived signal — not a judgement. How it's calculated
What the score is responding to:
This facility scores 15. The national average across 7,437 scored United States facilities is 2 — 13 points above national average.
Same country, matched on type + security level where possible.
Higher risk than 96% of peer facilities in United States.
How many of our profile fields are populated. We surface this so families and researchers know the limits.
Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). San Quentin Rehabilitation Center. Retrieved July 21, 2026, from https://worldprisons.com/prisons/san-quentin
"San Quentin Rehabilitation Center." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/san-quentin.
@misc{worldprisons-san-quentin,
author = {{World Prisons}},
title = {San Quentin Rehabilitation Center},
year = {2026},
url = {https://worldprisons.com/prisons/san-quentin},
urldate = {2026-07-21}
}