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United States · CA · San Quentin

San Quentin Rehabilitation Center

State prisonMaximummaleClosed 2019Overcrowded (107%)LowHigh
Verified · Data dated
Aging · 5mo ago
Sources last reviewed on · data-as-of

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

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How to send mail, money, and visit San Quentin Rehabilitation Center

Step-by-step guidance using the United States system — addresses, money services, visit booking, what to bring on your first visit.

Open toolkit
Photograph of San Quentin Rehabilitation Center

Gallery

From Wikimedia Commons (CC-BY-SA where not otherwise stated).

  • Aerial view of San Quentin State Prison.jpg

    Photo by Jesstess87 via Wikimedia Commons (CC BY-SA 4.0)

  • California - San Rafael through San Quentin - NARA - 23935251.jpg

    Photo by Unknown authorUnknown author or not provided via Wikimedia Commons (Public domain)

  • Detail, from- What Shall We Do with Our Boys, by George Frederick Keller, published in The Wasp on March 3, 1882 - Oakland Museum of California - DSC05171 (cropped) (cropped).JPG

    Photo by George Frederick Keller via Wikimedia Commons (Public domain)

  • Ferris Wheel, toothpick art made by a San Quentin prison inmate - Musée Mécanique - San Francisco, CA - DSC02937.JPG

    Photo by Daderot via Wikimedia Commons (CC0)

  • Gaschamber.jpg

    Photo by California Department of Corrections via Wikimedia Commons (Public domain)

  • Harry Bridges signs the register at San Quentin prison B&W Crop.jpg

    Photo by The San Francisco Call Bulletin via Wikimedia Commons (Public domain)

  • Harry Bridges signs the register at San Quentin prison B&W.jpg

    Photo by The San Francisco Call Bulletin via Wikimedia Commons (Public domain)

  • Harry Bridges signs the register at San Quentin prison Crop.jpg

    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.

Background

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

Facility profile

Population held

male

Opened

1852

Region

CA

Security level

Maximum

Death-row facility

No

Conditions

Newly rebranded as a rehabilitation center. Death row population (~600) transferred to other prisons under a 2022 executive order.

Visiting

Friday-Sunday visits with prior approval via CDCR Visitor Processing. Photo ID required.

Mailing

Inmate Name, CDCR #, San Quentin Rehabilitation Center, San Quentin, CA 94964.

Practical info

GTL ConnectNetwork for phone/video. JPay accepted. The San Quentin News is one of the few inmate-run newspapers in the US.

Known issues

COVID-19 outbreak in 2020 caused 28 inmate deaths; California Court of Appeal called response 'morally indefensible'.

Notable inmates

  • Phillip Carl Jablonski
    Phillip Carl Jablonski
    1946–2019 · serial killer

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

  • Thomas Silverstein
    Thomas Silverstein
    1952–2019 · criminal
  • Bill Dallas
    1962 · religious writer
  • Billy Ray Waldon
    Billy Ray Waldon
    1952 · Esperantist
  • David Esco Welch
    David Esco Welch
    1958 · murderer

    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 Sully
    Anthony Sully
    1944–2023 · police officer

    Anthony John Sully (January 2, 1944 – 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.

  • Melford Henson
    1954–2020 · construction foreman
  • Lawrence Bittaker
    Lawrence Bittaker
    1940–2019 · serial killer
  • Doug Clark
    Doug Clark
    1948–2023 · serial killer

    Douglas Daniel Clark (March 10, 1948 – October 11, 2023) was an American serial killer and necrophile.

Showing 9 of 12. Source: Wikidata + Wikipedia.

Contact & address

100 Main Street, San Quentin 94964

Conditions Risk Score

Derived signal — not a judgement. How it's calculated

15/100
Low concern15/100
Overcrowding
5/30
Oversight reports
0/30
Structural flags
5/15
Death signals
5/15
Conditions text
0/10

What the score is responding to:

  • · Operating at 107% of design capacity
  • · Substantial documented known-issues record
  • · In-custody-death signal in sources

This facility scores 15. The national average across 7,437 scored United States facilities is 2 — 13 points above national average.

Related facilities

All in United States →

Same country, matched on type + security level where possible.

Compared to other facilities in United States

7436 peers
Conditions risk scorethis: 15/100 · peers avg: 2/100 (+549%)

Higher risk than 96% of peer facilities in United States.

Occupancythis: 107% · peers avg: 93% (+15%)
Capacity (beds)this: 3082 · peers avg: 547 (+464%)

Data completeness

100%

How many of our profile fields are populated. We surface this so families and researchers know the limits.

Cite this page

Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.

APA
World Prisons. (2026). San Quentin Rehabilitation Center. Retrieved October 20, 2026, from https://worldprisons.com/prisons/san-quentin
Chicago
"San Quentin Rehabilitation Center." World Prisons. Accessed October 20, 2026. https://worldprisons.com/prisons/san-quentin.
BibTeX
@misc{worldprisons-san-quentin,
  author = {{World Prisons}},
  title = {San Quentin Rehabilitation Center},
  year = {2026},
  url = {https://worldprisons.com/prisons/san-quentin},
  urldate = {2026-10-20}
}