Fleury-Mérogis Prison
| Location | Fleury-Mérogis, France | 
|---|---|
| Status | Operational | 
| Capacity | 2,956 | 
| Population | 4,300+ (as of 2018) | 
| Opened | 1968 | 
| Managed by | Ministry of Justice | 
| Country | France | 
| Website | Official website | 
Fleury-Mérogis Prison (Maison d'arrêt de Fleury-Mérogis) is a prison in France, located in the town of Fleury-Mérogis, in the southern suburbs of Paris. With more than 4,100 prisoners, it is the largest prison in Europe. It is operated by the Ministry of Justice.
Fleury-Mérogis is notorious as a leading center of Islamist radicalization in European prisons.