Help End Prison Gerrymandering Prison gerrymandering funnels political power away from urban communities to legislators who have prisons in their (often white, rural) districts. More than two decades ago, the Prison Policy Initiative put numbers on the problem and sparked the movement to end prison gerrymandering.

Can you help us continue the fight? Thank you.

—Peter Wagner, Executive DirectorDonate

Maryland correctional populations of Census 2010 vintage

We recommend using these addresses only for guidance in identifying prison populations in the Census data and warn against assuming that the prisons were in fact counted at that particular location.

Facility Name Prisoners Type Address City Zip County Survey Date
Allegany County Detention Center 179 Local 14300 Mcmullen Highway SW Cumberland 21502 3/31/2006
Anne Arundel County 1,045 Local 131 Jennifer Road Annapolis 21401 3/31/2006
Baltimore City 3,436 Local Div Of Pretrail Detn And Services Baltimore 21202 3/31/2006
Baltimore City Correctional Center 507 State 901 Greenmount Avenue Baltimore 21202 Baltimore City 12/30/2005
Baltimore County Bureau Of Corrections 1,346 Local 720 Bosley Avenue Towson 21204 3/31/2006
Baltimore Pre-Release Unit 218 State 926 Greenmount Avenue Baltimore 21202 Baltimore City 12/30/2005
Baltimore Pre-Release Unit - Women 144 State 301 N Calverton Road Baltimore 21223 Baltimore City 12/30/2005
Brockbridge Correctional Facility 623 State 7931 Brock Bridge Road Jessup 20794 Anne Arundel County 12/30/2005
Calvert County Detention Center 205 Local 325 Stafford Road Barstow 20610 3/31/2006
Caroline County Jail 100 Local 101 Gay Street Denton 21629 3/31/2006
Carroll County Detention Center 289 Local 100 North Court Street. Westminster 21157 3/31/2006
Cecil County Community Adult Rehab Ctr 65 Local 500 Landing Lane Elkton 21921 3/31/2006
Cecil County Detention Center 208 Local 500 Landing Lane Elkton 21921 3/31/2006
Central Laundry Facility 516 State 7301 Buttercup Road Sykesville 21784 Carroll County 12/30/2005
Charles County Detention Center 425 Local 6905 Crain Highway La Plata 20646 3/31/2006
Cumberland FCI 1,237 Federal 4/1/2010
Cumberland FCI & Camp 1,404 Federal 14601 Burbridge Road Se Cumberland 21501 Allegany County 12/30/2005
Cumberland-Camp 258 Federal 4/1/2010
Dismas House East 45 Private 1415 N Caroline Street Baltimore 21213 Baltimore City 12/30/2005
Dismas House West 44 Private 105 S Mount Street Baltimore 21223 Baltimore City 12/30/2005
Dorchester County Detention Center 203 Local 829 Fieldcrest Road Cambridge 21613 3/31/2006
Eastern Correctional Inst & Eci Annex 3,122 State 30420 Revells Neck Road Westover 21890 Somerset County 12/30/2005
Eastern Pre-Release Unit 172 State 700 Flat Iron Square Road Church Hill 21623 Queen Annes County 12/30/2005
Frederick County Adult Detention Center 451 Local 7300 Marchies Choice Lane Frederick 21704 3/31/2006
Garrett County Jail 58 Local 311 East Alder Street Oakland 21550 3/31/2006
Harford County Detention Center 416 Local 1030 N Rock Spring Avenue Bel Air 21014-0150 3/31/2006
Herman L. Toulson Boot Camp 384 State 2001 Toulson Road Jessup 20794 Anne Arundel County 12/30/2005
Howard County Detention Center 289 Local 7301 Waterloo Road Jessup 20794 3/31/2006
Jessup Pre-Release Unit 596 State 2000 Toulson Road Jessup 20794 Anne Arundel County 12/30/2005
Kent County Detention Center 75 Local Unit A - 104 Vickers Drove Chestertown 21620-3327 3/31/2006
Maryland Correctional Adjustment Center 269 State 401 E Madison Street Baltimore 21202 Baltimore City 12/30/2005
Maryland Correctional Inst - Hagerstown 2,112 State 18601 Roxbury Road Hagerstown 21746 Washington County 12/30/2005
Maryland Correctional Inst For Women 802 State 7943 Brock Bridge Road Jessup 20794 Anne Arundel County 12/30/2005
Maryland Correctional Institution - Jessup 988 State P.O. Box 549 Jessup 20794 Anne Arundel County 12/30/2005
Maryland Correctional Training Center 2,682 State 18800 Roxbury Road Hagerstown 21746 Washington County 12/30/2005
Maryland House Of Correction - Annex 1,151 State P.O. Box 534 Jessup 20794 Anne Arundel County 12/30/2005
Maryland House Of Corrections 1,202 State P.O. Box 534 Jessup 20794 Anne Arundel County 12/30/2005
Maryland Reception, Diagnostic & Class Ctr 542 State 550 E Madison Street Baltimore 21202 Baltimore City 12/30/2005
Metropolitan Transition Center 1,485 State 954 Forest Street Baltimore 21202 Baltimore City 12/30/2005
Montgomery County 1,086 Local 51 Monroe St Rockville 20850 3/31/2006
North Branch Correctional Institution 253 State 14100 Mcmullen Hwy Sw Cumberland 21502 Allegany County 12/30/2005
Patuxent Institution & Re-Entry Facility 755 State Route 175 Box 700 Jessup 20794 Anne Arundel County 12/30/2005
Poplar Hill Pre-Release Unit 190 State 24090 Nanticoke Road Quantico 21856 Wicomico County 12/30/2005
Prince Georges County Correctional Center 1,439 Local 13400 Dille Drive Upper Marlboro 20772 3/31/2006
Queen Anne's County Detention Center 101 Local 500 Little Hut Drive Centerville 21617 3/31/2006
Roxbury Correctional Institution 1,721 State 18701 Roxbury Road Hagerstown 21746 Washington County 12/30/2005
Somerset County Detention Center 76 Local 30474 Revells Neck Road Westover 21871-3369 3/31/2006
Southern Maryland Pre-Release Unit 178 State 14320 Oaks Road Charlotte Hall 20622 St Marys County 12/30/2005
St Mary's County Detention Center 318 Local 41880 Baldridge Street Leonardtown 20650 3/31/2006
Talbot County Jail 82 Local 115 West Dover Street Easton 21601 3/31/2006
Threshold Inc 28 Private 1702 St. Paul Street Baltimore 21202 Baltimore City 12/30/2005
Voa Chesapeake, Inc 63 Private 1105 E. Fayette Street Baltimore 21202 Baltimore County 12/30/2005
Volunteers Of America CSC 70 Private 4601 E. Monument Street Baltimore 21205 Baltimore City 12/30/2005
Washington County Detention Center 377 Local 500 Western Maryland Parkway Hagerstown 21740-5125 3/31/2006
Western Correctional Institution 1,751 State 13800 Mcmullen Hwy Sw Cumberland 21502 Allegany County 12/30/2005
Wicomico County Detention Center 607 Local 411 Naylor Mill Road Salisbury 21801 3/31/2006
Worcester County Jail 221 Local 5022 Joyner Road Snow Hill 21863 3/31/2006

This table draws data from three sources:

  • Federal prisons on April 1, 2010: The Prison Policy Initiative downloaded the weekly population list from the Bureau of Prisons for that date on April 4, 2010.
  • State and federal correctional facilities on December 30, 2005 were extracted from: United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics. Census of State and Federal Adult Correctional Facilities, 2005 [Computer file]. ICPSR24642-v2. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2010-10-05. doi:10.3886/ICPSR24642
  • Local jails on March 31, 2006 was extracted from: United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics. Census of Jail Facilities, 2006 [Computer file]. ICPSR26602-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2010-01-26. doi:10.3886/ICPSR26602

Military prisons and state halfway houses are not included in the above table as we were not able to locate an appropriate national database of these types of facilities. Juvenile facilities are not included in the above because the Census Bureau counts these facilities separately from the adult correctional institutions that are the focus of our work. Where necessary, state-specific sources will be more useful for identifying juvenile facilities.

We do, however, have a list (without population information) of all federal halfway houses as of March 2010.

For state, federal and local prisons built or expanded in the latter half of the decade, you may find this list of New and Expanded Prisons Since 2000 helpful as well.

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