page_title: Supermax prison
section_title: United States
hierarchical_section_title: Supermax prison / Prisons with supermax facilities / North America / United States
caption_attribution_description: English: Mississippi State Penitentiary main entrance
context_page_description: A super-maximum security or administrative maximum prison is a "control-unit" prison, or a unit within prisons, which represents the most secure levels of custody in the prison systems of certain countries. The objective is to provide long-term, segregated housing for inmates classified as the highest security risks in the prison system and those who pose an extremely serious threat to both national and global security.
context_section_description: Most of these facilities only contain supermax wings or sections, with other parts of the facility under lesser security measures.
  Alabama
  Holman Correctional Facility – Atmore, Alabama
  Arizona
  ASPC-Eyman, SMU I – Florence, Arizona
  ASPC-Eyman, Browning Unit (Previously SMU II) – Florence, Arizona
  United States Penitentiary – Tucson, Arizona
  Arkansas
  Varner Supermax – Lincoln County, Arkansas
  California
  United States Penitentiary – Atwater, California
  Pelican Bay State Prison – Crescent City, California
  United States Penitentiary, Alcatraz Island – San Francisco, California (Closed 21 March 1963)
  California Correctional Institution, Tehachapi, California
  High Desert State Prison – Susanville, California
  Richard J. Donovan Correctional Facility – San Ysidro, California
  Colorado
  Centennial Correctional Facility - Cañon City, Colorado
  Colorado State Penitentiary – Cañon City, Colorado
  United States Penitentiary, Administrative Maximum Facility (ADX Florence) – Florence, Colorado
  Connecticut
  Northern Correctional Institution – Somers, Connecticut
  Florida
  United States Penitentiary – Coleman, Florida
  Florida State Prison – Raiford, Florida
  Georgia
  United States Penitentiary – Atlanta, Georgia
  Idaho
  Idaho Maximum Security Institution – Boise, Idaho
  Illinois
  United States Penitentiary – Marion, Illinois (Downgraded to a medium-security facility in September 2006)
  Tamms Correctional Center – Tamms, Illinois (Closed January 2013)
  Menard Correctional Center – Chester, Illinois
  Indiana
  Wabash Valley Correctional Facility, SHU – Carlisle, Indiana
  United States Penitentiary – Terre Haute, Indiana
  Westville Correctional Facility, WCU – Westville, Indiana
  Kansas
  United States Disciplinary Barracks – Fort Leavenworth, Kansas (military prison)
  United States Penitentiary – Leavenworth, Kansas (being downgraded to medium security)
  Kentucky
  Kentucky State Penitentiary – Eddyville, Kentucky (the only prison in Kentucky housing supermax units)
  Louisiana
  Louisiana State Penitentiary – West Feliciana Parish, Louisiana
  United States Penitentiary Pollock
  Maine
  Maine State Prison – Warren, Maine
  Maryland
  Chesapeake Detention Facility – Baltimore, Maryland
  North Branch Correctional Institution – Cumberland, Maryland (final housing unit began operation in summer of 2008)
  Massachusetts
  Souza-Baranowski Correctional Center- Lancaster, Massachusetts
  Massachusetts Correctional Institution – Cedar Junction – Walpole, Massachusetts
  Minnesota
  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)
  Mississippi
  Mississippi State Penitentiary – Sunflower County, Mississippi (Unit 32)
  Missouri
  Jefferson City Correctional Center – Jefferson City, MissouriPotosi, SECC, SCCC, Chillicothe, etc
  New Hampshire
  New Hampshire State Prison for Men – Concord, New Hampshire
  New Jersey
  New Jersey State Prison – Trenton, New Jersey
  East Jersey State Prison – Woodbridge, New Jersey
  Northern State Prison – Newark, New Jersey
  Essex County Correctional Facility – Newark, New Jersey
  New Mexico
  Penitentiary of New Mexico – unincorporated Santa Fe County, New Mexico – Uses the Bureau Classification System – Level 6 being Supermax
  New York
  Attica Correctional Facility – Attica, New York
  Upstate Correctional Facility – Malone, New York
  Sing Sing Correctional Facility – Ossining, New York
  Southport Correctional Facility – (disciplinary supermax prison with only solitary confinement), Pine City, New York
  North Carolina
  Polk Correctional Institution – Butner, North Carolina
  Ohio
  Ohio State Penitentiary – Youngstown, Ohio
  Oklahoma
  Oklahoma State Penitentiary – McAlester, Oklahoma
  Oregon
  Oregon State Penitentiary  – Salem, Oregon
  Pennsylvania
  United States Penitentiary – Allenwood, Pennsylvania
  United States Penitentiary – Lewisburg, Pennsylvania
  State Correctional Institution Greene – Waynesburg, Pennsylvania
  State Correctional Institution – Phoenix - Skippack Township, Pennsylvania
  South Carolina
  Kirkland Correctional Institution – Columbia, Sout
caption: Mississippi State Penitentiary houses State of Mississippi supermax units
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