United States · Maine · Warren
Maine State Prison
Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.
For families
How to send mail, money, and visit Maine State Prison
Step-by-step guidance using the United States system — addresses, money services, visit booking, what to bring on your first visit.
Maine State Prison is a state prison located in Knox County, Maine. Rated capacity: 916. Reported population: 836. Security level: Close. Data sourced from the HIFLD Prison Boundaries open dataset.
Background
The Maine State Prison was erected in Thomaston, Maine in 1824 and relocated to Warren in 2002. This maximum-security prison has a capacity of 916 adult male inmates with an average daily population of 900.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
916
Current population
836
Occupancy
91%
Year opened
2002
Operational
Figures from official sources · verified 2 Jun 2026 · methodology
Facility profile
Operator
Maine Department of CorrectionsPopulation held
Mixed/unknown
Opened
2002
Region
Maine
Security level
Close
Death-row facility
No
Conditions
No conditions summary available yet.
Visiting
No visiting information available.
Mailing
No mailing information available.
Practical info
Contact the operator's website for inmate-specific procedures.
Known issues
No major issues documented in our database.
Contact & address
Conditions Risk Score
Derived signal — not a judgement. How it's calculated
- Overcrowding
- 0/30
- Oversight reports
- 0/30
- Structural flags
- 0/15
- Death signals
- 0/15
- Conditions text
- 0/10
This facility scores 0. The national average across 7,437 scored United States facilities is 2 — 2 points below national average.
Related facilities
Same country, matched on type + security level where possible.
- Nh Correctional Facility For WomenGoffstownCloseState prison154% occupancy
- Ga Diagnostic & Classification State PrisonJacksonCloseState prison136% occupancy
- Mat-Su PretrialPalmerCloseState prison100% occupancy
- Franklin Medical Center (Zone B)ColumbusCloseState prison101% occupancy
- Florida State Prison - West UnitRaifordCloseState prison103% occupancy
- Reception And Medical Center, West UnitLake ButlerCloseState prison107% occupancy
Compared to other facilities in United States
7436 peersData completeness
74%How many of our profile fields are populated. We surface this so families and researchers know the limits.
Sources
- HIFLD Prison Boundaries
- HIFLD dataset query
- Wikipedia — Wikimedia Foundation
- HIFLD Prison Boundaries — US Department of Homeland Security â HIFLD Open Data
- OpenStreetMap — OpenStreetMap Contributors
- Wikidata — Wikimedia Foundation
- Wikidata (Q6736486)
- Wikipedia
- See /data-sources for our overall methodology.
Cite this page
Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). Maine State Prison. Retrieved October 21, 2026, from https://worldprisons.com/prisons/maine-state-prison
"Maine State Prison." World Prisons. Accessed October 21, 2026. https://worldprisons.com/prisons/maine-state-prison.
@misc{worldprisons-maine-state-prison,
author = {{World Prisons}},
title = {Maine State Prison},
year = {2026},
url = {https://worldprisons.com/prisons/maine-state-prison},
urldate = {2026-10-21}
}