France · Île-de-France · Fleury-Mérogis
Maison d'arrêt de Fleury-Mérogis
Data is aggregated from public sources and may be incomplete or out of date.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
Facility profile
Operator
Administration pénitentiaire
Population held
mixed
Opened
1968
Region
Île-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
Salah Abdeslam (2016 pre-trial), various 2015 Paris-attacks conspirators (pre-trial).
Contact & address
Conditions Risk Score
Derived signal — not a judgement. How it's calculated
- 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
Trend over time
Population and occupancy by year. Source: official corrections statistics + oversight reports.
Population held
Occupancy %
Compared to other facilities in France
557 peersHigher risk than 100% of peer facilities in France.
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
- Ministère de la Justice — Statistiques de la population détenue — République française
- Contrôleur général des lieux de privation de liberté — République française
- See /data-sources for our overall methodology.