Fresnes Prison is the second largest prison in France, located in the town of Fresnes, Val-de-Marne, south of Paris. It comprises a large men's prison of about 1200 cells, a smaller one for women and a penitentiary hospital.

Fleury-Mérogis Prison 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.