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France · Ãle-de-France · Fleury-Mérogis
Maison d'arrêt de Fleury-Mérogis
Maison d'arrêt (remand)MixedmixedOvercrowded (147%)ModerateHigh
Verified · Data dated
Fresh · 2mo 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Data is aggregated from public sources and may be incomplete or out of date.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.
For families
How to send mail, money, and visit Maison d'arrêt de Fleury-Mérogis
Step-by-step guidance using the France system — addresses, money services, visit booking, what to bring on your first visit.
Gallery
From Wikimedia Commons (CC-BY-SA where not otherwise stated).
Photo by Nanou Battestini via Wikimedia Commons (CC BY 3.0)
Photo by Thomon via Wikimedia Commons (CC BY-SA 4.0)
Photo by Thomon via Wikimedia Commons (CC BY-SA 4.0)
Europe's largest prison by inmate count. Includes male, female, and minor sections. Holds remand and short-sentence prisoners from Paris-region courts.
Capacity
2,855
Current population
4,200
Occupancy
147%
Year opened
1968
Operational
Figures from official sources · verified 29 May 2026 · methodology
Facility profile
Operator
Administration pénitentiairePopulation held
mixed
Opened
1968
Region
Ãle-de-France
Security level
Mixed
Death-row facility
No
Conditions
Persistent overcrowding above 145%, with mattresses on cell floors documented.
Visiting
Visits require a permis de visite issued by the investigating magistrate (remand) or prison administration (sentenced).
Mailing
Letters screened. Format: Nom Prénom écrou n°, MA Fleury-Mérogis, 7 avenue des Peupliers, 91705 Fleury-Mérogis Cedex.
Practical info
On-site visitor centre (Maison d'accueil des familles) run by an associative network.
Known issues
France has been repeatedly condemned by the European Court of Human Rights for conditions at Fleury-Mérogis (J.M.B. v. France, 2020).
Notable inmates
Mehran Karimi Nasseri1945–2022 · memoiristMehran Karimi Nasseri (Persian: Ù Ùرا٠کرÛÙ Û ÙاصرÛ, pronounced [mehËrÉn kæriËmi nÉseËri]; 1945 â 12 November 2022), also known as Sir, Alfred Mehran, was an Iranian refugee who lived in the departure lounge of Terminal 1 at Charles de Gaulle Airport from 26 August 1988 until July 2006.
- Alexandre Brandy1987 · writer
- Ryke Geerd Hamer1935–2017 · physician
Ryke Geerd Hamer (17 May 1935 â 2 July 2017) was a German former physician and the originator of Germanic New Medicine (GNM), also formerly known as German New Medicine and New Medicine, a system of pseudo-medicine that purports to be able to cure cancer.
- Bruno Sulak1955–1985 · gangster
- Salim Berrada1985 · engineer
- Brigitte Brami1964 · writer
- Mihraç Ural1956 · warlord
Mihrac Ural (Arabic: Ù Ùراج Ø£ÙراÙ), also known as Ali Kayali (Arabic: عÙÙ ÙÙاÙÙ), is a Turkish-Syrian Alawite militant and leader of the Syrian Resistance (formerly known as the Popular Front for the Liberation of the Sanjak of Iskandarun), a pro-Ba'athist Syrian militia.
- Jean Castela? · teacher
Christine Deviers-Joncour1947 · writer
Showing 9 of 12. Source: Wikidata + Wikipedia.
Contact & address
Conditions Risk Score
Derived signal — not a judgement. How it's calculated
17/100
Moderate concern17/100
- Overcrowding
- 12/30
- Oversight reports
- 0/30
- Structural flags
- 5/15
- Death signals
- 0/15
- Conditions text
- 0/10
What the score is responding to:
- · Operating at 147% of design capacity
- · Substantial documented known-issues record
This facility scores 17. The national average across 732 scored France facilities is 12 — 5 points above national average.
Trend over time
Population and occupancy by year. Source: official corrections statistics + oversight reports.
Population held
2018: 4,050+3.7%2024: 4,200
Occupancy %
2018: 142.0%+3.5%2024: 147.0%
Related facilities
Same country, matched on type + security level where possible.
- Maison d'arrêt AuxerreAuxerrepretrialMaison d'arrêt208% occupancy
- Maison d'arrêt CarcassonnepretrialMaison d'arrêt236% occupancy
- Maison d'arrêt VannespretrialMaison d'arrêt200% occupancy
- Maison d'arrêt BayonneBayonnepretrialMaison d'arrêt209% occupancy
- Maison d'arrêt LimogesLimogespretrialMaison d'arrêt219% occupancy
- Maison d'arrêt AmiensAmienspretrialMaison d'arrêt212% occupancy
Compared to other facilities in France
731 peersConditions risk scorethis: 17/100 · peers avg: 12/100 (+37%)
Higher risk than 61% of peer facilities in France.
Occupancythis: 147% · peers avg: 139% (+6%)
Capacity (beds)this: 2855 · peers avg: 336 (+750%)
Reports
- European Court of Human Rights — J.M.B. v. France30 Jan 2020
France condemned for systemic Article 3 violations in remand prisons including Fleury-Mérogis. Pilot judgement requiring structural reform.
Data completeness
100%How many of our profile fields are populated. We surface this so families and researchers know the limits.
Sources
- Contrôleur général des lieux de privation de liberté
- Contrôleur général des lieux de privation de liberté — République française
- Ministère de la Justice â Statistiques de la population détenue — République française
- Wikidata (Q3279226)
- Wikipedia
- Wikimedia Commons
- See /data-sources for our overall methodology.
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). Maison d'arrêt de Fleury-Mérogis. Retrieved July 21, 2026, from https://worldprisons.com/prisons/fleury-merogis
Chicago
"Maison d'arrêt de Fleury-Mérogis." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/fleury-merogis.
BibTeX
@misc{worldprisons-fleury-merogis,
author = {{World Prisons}},
title = {Maison d'arrêt de Fleury-Mérogis},
year = {2026},
url = {https://worldprisons.com/prisons/fleury-merogis},
urldate = {2026-07-21}
}