Middlesex County, Massachusetts Jail & Detention Facility Guide
Confirm the current jail or detention location through the responsible Middlesex County agency before mailing, paying, visiting, calling, or traveling. This page combines county-specific geography, official-source routing, state corrections guidance, and transfer checks without inventing an unverified facility list.
Facility search: quick answer
Middlesex Jail & House of Correction snapshot
| Operator | Middlesex Sheriff's Office |
|---|---|
| Published address or location context | 269 Treble Cove Road, Billerica, MA 01862 |
| Custody coverage | People housed at the Middlesex Jail & House of Correction, including men awaiting trial or serving sentences up to 2.5 years and women assigned to the pre-release center |
| Search method | Official phone-assisted custody check through the Middlesex Jail & House of Correction; provide the person's full name and identifying details |
| Release/history limitation | No complete public released-person archive is claimed; a missing current-custody result may reflect release, transfer, another agency, or delayed information |
| Public phone | 978-667-1711 |
County profile for facility verification
The Census Bureau Vintage 2025 estimate for Middlesex County is 1,669,979 residents, compared with 1,624,461 in 2020. The estimated change was +45,518 people (2.8%). It ranks #1 among 14 county equivalents in Massachusetts.
| Jurisdiction fact | Value | Facility-search relevance |
|---|---|---|
| Official Census name | Middlesex County | Confirms the county-equivalent connected to the facility search |
| GEOID | 25017 | Distinguishes same-named counties and cities |
| County-equivalent type | County | Explains the jurisdiction model |
| 2025 resident population | 1,669,979 | Provides jurisdiction scale; it is not jail population or capacity |
| Adjacent jurisdictions | 5 | Supports nearby checks during regional or cross-county housing |
How to confirm the current facility
- Open the parent Middlesex County inmate-search guide and identify the responsible sheriff, corrections department, detention center, regional jail, state agency, or other custodian.
- Use the verified custody method linked above.
- Confirm the exact facility name, booking or inmate number, current status, and jurisdiction.
- Open the official facility or agency page before sending mail, money, documents, or planning a visit.
- Reconfirm the location after court, medical transport, classification, contract placement, or transfer.
Why a jurisdiction can use more than one detention location
Local custody may be handled by a county sheriff or house of correction, while state-prison custody is handled separately by the Massachusetts Department of Correction. A jurisdiction may use an intake center, main jail, annex, work-release center, city jail, regional authority, juvenile facility, medical unit, courthouse holding area, or contracted beds. The public agency result or official information line is the best current source for where an adult is housed.
Facility details to verify
| Detail | Why it matters | Where to verify |
|---|---|---|
| Official facility name | Prevents confusion with an old, renamed, closed, or informal jail name | Responsible agency or current inmate result |
| Operating agency | Identifies the correct locator, phone, mail, money, and visitation rules | Sheriff, corrections, regional authority, state, or contracted public portal |
| Street and mailing address | Physical location and inmate-mail address can differ | Current official facility page |
| Public information phone | Confirms urgent transfer or release questions when published | Official contact page |
| Custody population served | A building may handle intake, pretrial, sentenced, work-release, medical, or another group | Agency facility description |
| Search relationship | Shows whether the county search covers the facility or another system must be used | Locator coverage statement |
Mail, money, visitation, and phone services
Do not use a facility address or vendor from an old third-party page. Open the current official sheriff, corrections, jail, regional authority, or facility page and confirm the recipient format, inmate number, permitted items, vendor, visitation approval process, schedule, identification requirements, and communication rules. Transfers can invalidate previously correct instructions.
When the facility shown online changes
A location can change after court, classification, sentence, disciplinary action, medical care, protective placement, overcrowding, regional placement, contract housing, state transfer, federal hold, or release processing. A changed location does not by itself explain the person’s legal status.
State and federal alternatives
If the person has entered state custody, use the Massachusetts state inmate-search guide. The state agency is Massachusetts Department of Correction and the published state tool is Massachusetts VINE. If federal custody is confirmed, use the federal BOP guide.
Nearby county searches
Essex County inmate search
Massachusetts · GEOID 25009
Norfolk County inmate search
Massachusetts · GEOID 25021
Suffolk County inmate search
Massachusetts · GEOID 25025
Worcester County inmate search
Massachusetts · GEOID 25027
Hillsborough County inmate search
New Hampshire · GEOID 33011
How this guide avoids stale facility data
The parent county has a verified official custody pathway, but current facility details still must be reconfirmed before action.