List of United States federal prisons

[2] Most United States penitentiaries (USPs) are high-security facilities, which have highly secured perimeters with walls or reinforced fences, multiple and single-occupant cell housing, the highest staff-to-inmate ratio, and close control of inmate movement.

Federal correctional institutions (FCIs) are medium- and low-security facilities, which have strengthened perimeters (often double fences with electronic detection systems), mostly cell-type housing, a wide variety of work and treatment programs.

FCI Terre Haute contains a more restrictive section designated as a communication management unit for inmates considered high-security risks.

In August 2016, Justice Department officials announced that the FBOP would be phasing out its use of contracted facilities, on the grounds that private prisons provide less safe and less effective services with no substantial cost savings.

Federal prison camps (FPCs) are minimum-security facilities, which have dormitory housing, a relatively low staff-to-inmate ratio, and limited or no perimeter fencing.