| Bergin Correctional Institution | Storrs / Mansfield | Closed state prison; uncovered; closed August 12, 2011 and transferred to UConn in 2015. | — | Official CT DOC page → |
| Bridgeport Correctional Center | Bridgeport | Covered CT DOC correctional center; Level 4 and regional court-service facility. | 925 capacity | View facility → |
| Bridgeport Police Department Holding Facility | Bridgeport | Covered municipal police holding / short-term lockup. | — | View facility → |
| Bristol Police Department Holding Facility | Bristol | Covered municipal police holding / booking. | — | View facility → |
| Brooklyn Correctional Institution | Windham County | Covered CT DOC Level 3 medium-security prison. | 456 beds | View facility → |
| Cheshire Correctional Institution | Cheshire / New Haven County | Covered CT DOC Level 4 facility. | 1,546 capacity | View facility → |
| Corrigan-Radgowski Correctional Center / Corrigan Correctional Center | New London County | Covered CT DOC correctional center. | — | View facility |
| Cybulski Community Reintegration Center | Somers / Tolland County | Covered CT DOC Level 2 reintegration center. | 684 beds | View facility → |
| Danbury Police Department Headquarters | Danbury | Covered municipal police holding / arrest processing. | — | View facility → |
| East Hartford Police Department | East Hartford | Covered municipal police holding / arrest processing. | — | View facility → |
| Enfield Correctional Institution | Enfield | Closed state prison; uncovered; listed by CT DOC but not in July 6, 2026 active daily population data. | — | Official CT DOC page → |
| Federal Correctional Institution Danbury / FCI Danbury | Danbury / Fairfield County | Covered federal BOP prison; low-security FCI with adjacent minimum-security camp. | — | View facility → |
| Garner Correctional Institution | Newtown / Fairfield County | Covered CT DOC Level 4 high-security prison. | 725 beds | View facility → |
| Gates Correctional Institution | East Lyme / New London County | Closed state prison; uncovered; not in July 6, 2026 active daily population data. | — | Official CT DOC page → |
| Geographical Area No. 1 at Stamford Superior Court | Stamford | Covered court holding / Judicial Branch marshal custody during court appearances. | — | View facility |
| Greenwich Police Department Public Safety Complex | Greenwich | Covered municipal police holding / arrest processing. | — | View facility → |
| Hamden Police Department | Hamden | Covered municipal police holding / arrest processing. | — | View facility → |
| Hartford Correctional Center | Hartford / Hartford County | Covered CT DOC Level 4 correctional center with regional court-service role. | 907 population | View facility → |
| Hartford Police Department Detention Program | Hartford | Covered municipal police detention / short-term holding. | — | View facility → |
| MacDougall-Walker Correctional Institution | Suffield / Hartford County | Covered CT DOC Level 4/5 prison. | 1,788 population | View facility → |
| Manchester Police Department Holding Facility | Manchester | Covered municipal police holding / arrest processing. | — | View facility → |
| Manson Youth Institution | Cheshire / New Haven County | Covered CT DOC youth institution for young male offenders. | 713 capacity | View facility → |
| Meriden Police Department Holding / Arrest Processing | Meriden | Covered municipal police holding / arrest processing. | — | View facility → |
| Milford Police Department | Milford | Covered municipal police holding / arrest processing. | — | View facility → |
| New Britain Police Department Headquarters Temporary Holding | New Britain | Covered municipal police holding / arrest processing. | — | View facility → |
| New Haven Correctional Center | New Haven / New Haven County | Covered CT DOC Level 4 correctional center. | 715 capacity | View facility → |
| Niantic Annex | Niantic / East Lyme | Closed or annex state facility listed by CT DOC; uncovered; not active as a separate July 2026 population row. | — | Official CT DOC page → |
| Northern Correctional Institution | Somers / Tolland County | Covered closed CT DOC former Level 5 prison. | 0 Current Inmates | View facility → |
| Norwalk Police Headquarters Holding Facility | Norwalk | Covered municipal police holding / arrest processing. | — | View facility → |
| Osborn Correctional Institution | Somers / Tolland County | Covered CT DOC Level 3 facility. | 1,487 beds | View facility → |
| REGIONS Community Residential Program at Hamden | Hamden / New Haven County | Covered Judicial Branch CSSD contracted community residential program. | — | View facility → |
| Robinson Correctional Institution | Enfield / Hartford County | Covered CT DOC Level 3 facility. | 1,233 population | View facility → |
| Stamford Police Department Headquarters | Stamford | Covered municipal police holding / arrest processing. | — | View facility → |
| Stratford Police Department Holding Cells | Stratford | Covered municipal police holding / arrest processing. | — | View facility → |
| UConn Health Medical-Surgical Ward | Farmington / Hartford County | Covered DOC medical-surgical ward / correctional medical custody; not an ordinary public jail roster. | — | View facility → |
| Waterbury Police Department Headquarters Holding Facility | Waterbury | Covered municipal police holding / arrest processing. | — | View facility → |
| Webster Correctional Institution | Cheshire / New Haven County | Closed state prison; uncovered; archived CT DOC facility page. | — | Official CT DOC page → |
| West Haven Police Department | West Haven | Covered municipal police holding / arrest processing. | — | View facility → |
| Willard-Cybulski Correctional Institution / Willard CI | Enfield / Somers area | Covered through Cybulski / Tolland research; active daily data uses Willard-Cybulski naming. | 684 beds | View facility → |
| York Correctional Institution | Niantic / East Lyme, New London County | Covered CT DOC women-only institution, Level 2-5. | 1,458 capacity | View facility → |
