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United States Penitentiary, Alcatraz Island, also known simply as Alcatraz (English: , Spanish: [alkaËtɾas] "the gannet") or The Rock, was a maximum security federal prison on Alcatraz Island, 1.25 miles (2.01 km) off the coast of San Francisco, California, United States. The site of a fort since the 1850s, the main prison building was built from 1910 to 1912 as a U.S. Army military prison. The United States Department of Justice acquired the United States Disciplinary Barracks, Pacific Branch, on Alcatraz on October 12, 1933. The island became adapted and used as a prison of the Federal Bureau of Prisons in August 1934 after the buildings were modernized and security increased. Given this high security and the island's location in the cold waters and strong currents of San Francisco Bay, prison operators believed Alcatraz to be escape-proof and America's most secure prison.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
312
Current population
—
Occupancy
—
Year opened
1934
Closed 1963
Figures from official sources · verified 29 May 2026 · methodology
Operator
Federal Bureau of PrisonsPopulation held
Mixed/unknown
Opened
1934
Region
—
Security level
Maximum
Death-row facility
No
No conditions summary available yet.
No visiting information available.
No mailing information available.
Contact the operator's website for inmate-specific procedures.
No major issues documented in our database.

Morton Sobell (April 11, 1917 â December 26, 2018) was an American engineer and Soviet spy during and after World War II; he was charged as part of a conspiracy which included Julius Rosenberg and his wife, Ethel Rosenberg.


Henri Theodore Young (born June 20, 1911 â disappeared 1972) was an American convicted bank robber and murderer who, while serving one of a series of prison terms, attempted to escape from Alcatraz Federal Penitentiary with four other inmates in 1939.

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Victor Lustig (German pronunciation: [ËvɪktoËÉ̯ ËlÊstɪç]; 4 January 1890 â 11 March 1947) was a con artist from Austria-Hungary, who undertook a criminal career that involved conducting scams across Europe and the United States during the early 20th century.


Arthur Raymond "Doc" Barker (June 4, 1899 â January 13, 1939) was an American criminal, the son of Ma Barker and a member of the Barker-Karpis gang, founded by his brother Fred Barker and Alvin Karpis.

On the night of June 11, 1962, inmates Frank Morris and brothers John and Clarence Anglin escaped from Alcatraz Federal Penitentiary, the maximum-security prison on Alcatraz Island in San Francisco Bay, California, United States.
Showing 9 of 12. Source: Wikidata + Wikipedia.
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Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). Alcatraz Federal Penitentiary. Retrieved July 21, 2026, from https://worldprisons.com/prisons/alcatraz-federal-penitentiary
"Alcatraz Federal Penitentiary." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/alcatraz-federal-penitentiary.
@misc{worldprisons-alcatraz-federal-penitentia,
author = {{World Prisons}},
title = {Alcatraz Federal Penitentiary},
year = {2026},
url = {https://worldprisons.com/prisons/alcatraz-federal-penitentiary},
urldate = {2026-07-21}
}