All prisons
Facility type
Supermax & Maximum Security
96 facilities across 12 countries
Data is aggregated from public sources and may be incomplete or out of date.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.
Australia49 facilities
United States16 facilities
- Alger Correctional Facility886 held
- Alger Maximum Correctional Facility
- ASPC - Eyman5,293 held
- ASPC - Florence3,666 held
- Columbia Correctional Institution1,041 held
- Dodge Correctional Institution1,629 held
- + 10 more
Nigeria15 facilities
Mexico4 facilities
Uganda4 facilities
- Kitalya Prison1,253 held
- Luzira Women Prison836 held
- Murchison Bay2,896 held
- Upper3,090 held
South Africa2 facilities
Ghana1 facility
- Ankaful Maximum Security Prison1,362 held
Egypt1 facility
New Zealand1 facility
Thailand1 facility
- Bang Kwang Central Prison7,500 held
United Kingdom1 facility