<Li> Minnesota Correctional Facility Oak Park Heights--Oak Park Heights, Minnesota (Although Oak Park Heights is classified as a Supermax, the majority of inmates are not housed in solitary confinement) </Li> <Li> Mississippi <Ul> <Li> Mississippi State Penitentiary--Sunflower County, Mississippi (Unit 32) </Li> </Ul> </Li> <Ul> <Li> Mississippi State Penitentiary--Sunflower County, Mississippi (Unit 32) </Li> </Ul> <Li> Mississippi State Penitentiary--Sunflower County, Mississippi (Unit 32) </Li>

Top 10 most secure prisons in the united states