Maine State Prison is a medium and maximum security state prison in Warren, Knox County, operated by the Maine Department of Corrections. It serves as MDOC's main reception facility for male residents who cannot be housed at Maine Correctional Center and includes an Intensive Mental Health Unit. This guide covers how to confirm someone is in custody, visiting hours and the visitor application, sending money through MDOC's own online deposit system, GTL/ViaPath phone calls, and mail rules. All data is verified from the Maine Department of Corrections.
City
Warren
County
Knox County
State
ME
Facility Type
State prison
Gender
Male
Capacity
993 adult male residents (MDOC's facility overview page states 993; a separate MDOC contact page for MSP lists 1,074 adult male beds. We could not resolve this discrepancy from official sources, so both figures are noted here instead of picking one to guess is current)
Custody Levels
Close, Medium, Special Management
Operator
Maine Department of Corrections (MDOC)
Address
807 Cushing Road, Warren, ME 04864
Phone
(207) 273-5300
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View ArticleThursday through Sunday visits, by approved visitor list and advance scheduling.
View ArticleFund the trust account and phone account directly through MDOC, not a third-party vendor.
View ArticleSet up AdvancePay so the resident's calls can reach you.
View ArticleMail to 807 Cushing Road, Warren, ME 04864-4600. White paper, dark ink, verifiable return address.
View ArticleMDOC runs a free, statewide Adult Resident/Adult Community Corrections Client Search, updated daily, covering everyone in MDOC custody including people boarded at county jails, other states, or federal facilities. It does not include juveniles, and it isn't a full criminal history. If your family member was recently arrested and hasn't been sentenced to an MDOC facility, check with the county jail instead, since MDOC doesn't operate jails.
See the full breakdownGeneral population visits at MSP run Thursday through Sunday in two blocks, 8:30-10:30 a.m. and 1:30-3:30 p.m. You must be an approved visitor (apply with the Adult Facility Visitor Application) and schedule at least 2 business days ahead by phone or email. Security includes metal detectors, K-9 searches, and a strict dress code.
See the full breakdownUnlike many states, Maine doesn't route trust account deposits through a private vendor like JPay or TouchPay. MDOC runs its own online Money Deposit Service, capped at $100/day and $200/week per account, funded by Visa or Mastercard. Funds post about 3 business days after the transaction, and deposits are non-refundable.
See the full breakdownMDOC's phone system runs through GTL/ViaPath Technologies via ConnectNetwork's AdvancePay Phone service. Families set up a prepaid AdvancePay account to receive collect calls, or fund the resident's own phone account directly through MDOC's Money Deposit Service. Maine law also funds some free calling minutes, though we couldn't confirm the exact current allowance from an official source.
See the full breakdownMail goes to the resident's name at 807 Cushing Road, Warren, ME 04864-4600. Since April 2021, general correspondence must be on plain white 8.5" x 11" paper in black or dark blue ink, with a verifiable return address. Cash can never be mailed. MSP doesn't publish detailed rules for mailed-in photos or packages, so call ahead.
See the full breakdown6 of 10 questions
Use the free Adult Resident/Adult Community Corrections Client Search at apps1.web.maine.gov/online/correctionssearch, which is updated daily. If the person was recently arrested and hasn't been sentenced to an MDOC facility yet, they are more likely at a county jail, since MDOC does not run the jails.
Inmate SearchGeneral population visits for the Close and Medium Custody Units run Thursday through Sunday, 8:30-10:30 a.m. and 1:30-3:30 p.m. You must already be an approved visitor and schedule at least 2 business days ahead by phone or email.
VisitationFill out the Adult Facility Visitor Application (available as a print or electronic version) and mail it to Attention: Visits, Maine State Prison, 807 Cushing Road, Warren, ME 04864. Clearance can take up to 6 weeks.
VisitationUse MDOC's own online Money Deposit Service. You need the resident's MDOC number, their date of birth, and a Visa or Mastercard. Deposits are capped at $100/day to the trust account and $100/day to the phone account.
Send MoneyCalls go through GTL/ViaPath Technologies via ConnectNetwork. Set up an AdvancePay account to receive and fund the resident's outgoing calls, or add money directly to their phone account through MDOC's Money Deposit Service.
Phone CallsSend mail to: [Resident's Name], Maine State Prison, 807 Cushing Road, Warren, ME 04864-4600.
MailYes. MDOC publishes a facility-specific Maine State Prison Resident Handbook (dated July 2021), available through the Maine Legislature's document library. Some details, like staff names, are outdated, so confirm anything time-sensitive directly with the facility.
AboutMaine State Prison is a medium and maximum security state prison in Warren, operated by the Maine Department of Corrections. It's MDOC's main reception facility for male residents who cannot be housed at Maine Correctional Center, and it includes an Intensive Mental Health Unit.
AboutYes, with rules. Minor children must be accompanied by a parent, legal guardian, or an approved adult, and children under 4 don't count toward the 3-visitor limit. A non-parent/guardian bringing a minor needs a notarized Minor Consent Form on file.
VisitationFamily members can be granted contact visits, but they may first be given non-contact visits before being cleared for contact. Residents can also be restricted to non-contact visitation for disciplinary, drug, tobacco, or contraband violations.
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All information on this page comes directly from official government and facility sources. How we verify information › Last verified July 21, 2026.