Ireland · Dublin
Data is aggregated from public sources and may be incomplete or out of date.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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From Wikimedia Commons (CC-BY-SA where not otherwise stated).
Photo by National Library of Ireland on The Commons via Wikimedia Commons (Public domain)
Photo by National Library of Ireland on The Commons via Wikimedia Commons (No restrictions)

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

Photo by HNS via Wikimedia Commons (CC BY-SA 2.0)
Photo by Alison Cassidy via Wikimedia Commons (CC BY-SA 3.0)

Photo by National Library of Ireland on The Commons via Wikimedia Commons (No restrictions)

Photo by National Library of Ireland on The Commons via Wikimedia Commons (No restrictions)
Capacity
—
Current population
—
Occupancy
—
Year opened
1850
Operational
Figures from official sources · verified 29 May 2026 · methodology
Operator
Irish Prison ServicePopulation held
Mixed/unknown
Opened
1850
Region
Dublin
Security level
—
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.

Johanna Mary Sheehy-Skeffington (née Sheehy; 24 May 1877 â 20 April 1946) was a suffragette and Irish nationalist.
Seamus Twomey (Irish: Séamus à Tuama; 5 November 1919 â 12 September 1989) was an Irish republican activist, militant, and twice chief of staff of the Provisional IRA.
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Thomas Patrick Ashe (Irish: Tomás Pádraig Ãghas; 12 January 1885 â 25 September 1917) was an Irish revolutionary and politician.

Antoine Maria Joseph Paul Artaud (; French: [aÊto]; 4 September 1896 â 4 March 1948), better known as Antonin Artaud (French pronunciation: [ÉÌtÉnÉÌ aÊto]), was a French artist who worked across a variety of media.

Seán MacBride (26 January 1904 â 15 January 1988) was an Irish Republican activist, politician, and diplomat who served as Minister for External Affairs from 1948 to 1951, Leader of Clann na Poblachta from 1946 to 1965 and Chief of Staff of the IRA from 1936 to 1937.

Mary Eva Comerford (2 June 1893 â 15 December 1982) was an Irish republican from County Wexford.
Madeleine ffrench-Mullen (30 December 1880 â 26 May 1944) was an Irish revolutionary and labour activist who took part in the Easter Rising in Dublin in 1916. Ffrench-Mullen was a member of the radical nationalist women's organisation Inghinidhe na hÃireann.
Source: Wikidata + Wikipedia.
No public contact details available.
Derived signal — not a judgement. How it's calculated
Same country, matched on type + security level where possible.
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). Mountjoy Prison. Retrieved July 21, 2026, from https://worldprisons.com/prisons/mountjoy-prison
"Mountjoy Prison." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/mountjoy-prison.
@misc{worldprisons-mountjoy-prison,
author = {{World Prisons}},
title = {Mountjoy Prison},
year = {2026},
url = {https://worldprisons.com/prisons/mountjoy-prison},
urldate = {2026-07-21}
}