Middlesex County Inmate Population
Middlesex County holds the largest inmate population of any county in Massachusetts. The Middlesex Jail and House of Correction in Billerica is the main facility. Sheriff Peter J. Koutoujian runs the operation. On a given day, between 800 and 1,000 inmates are in custody at the jail. The facility can hold over 1,000 people. Searching the Middlesex County inmate population is free online through the sheriff's website. You can also call the jail at 978-667-1711 for a status check on any person in custody. Phone lines are open around the clock. This guide walks through each way to find inmates and get records from the Middlesex County Sheriff's Office.
Middlesex County Jail Overview
Middlesex County Inmate Population Search
The Middlesex County Sheriff's Office keeps an online roster of current inmates. You can search it at middlesexsheriff.org/inmate-information. The roster lists every person in custody at the jail. Updates happen on a daily basis, with some records refreshing as often as every 15 minutes. No account or login is needed. Just go to the page and look through the list or use the search tool on the site.
Each entry on the Middlesex County inmate roster shows key details. You will see the person's full name, booking date, and housing location within the jail. Charges are listed along with bond or bail amounts. The next court date shows up too. If a release date has been set, that is on the record as well. This gives a clear picture of where someone stands in the system without having to call or visit the jail.
Phone search is the other fast option. Call 978-667-1711 at any hour. Staff at the jail can tell you if a person is in custody. They can share basic booking facts over the phone. For more detailed records, you may need to file a written request or come in person.
Middlesex County Jail and House of Correction
The main facility sits at 269 Treble Cove Road in Billerica. It is a large complex that serves all of Middlesex County. People held here fall into two groups. Pre-trial detainees make up a big share of the inmate population. During a recent audit, 1,253 inmates were pre-trial. Sentenced inmates totaled 4,678. Another 1,443 were booked through regional arrest processing. The total number processed came to 7,385 across the audit period.
The Middlesex County Sheriff's Office runs the facility and all related programs. Sheriff Peter J. Koutoujian has led the office and pushed for treatment-based approaches to incarceration. The admin office is at a separate location in Woburn at 12 Gill Street, Suite 4700. That is where records staff and other support teams work during business hours.
The screenshot below shows the official Middlesex County Sheriff's Office website, which serves as the hub for inmate population data and facility details.
The website has links for visiting, inmate search, and contact info all in one place.
| Facility | Middlesex Jail & House of Correction |
|---|---|
| Address |
269 Treble Cove Road Billerica, MA 01862 |
| Phone | 978-667-1711 (24 hours) |
| Admin Office |
12 Gill Street, Suite 4700 Woburn, MA 01801 |
| Sheriff | Peter J. Koutoujian |
| Website | middlesexsheriff.org |
Middlesex County Inmate Records Requests
Public records about the Middlesex County inmate population are available under Massachusetts law. M.G.L. Chapter 66, Section 10 gives every person the right to ask for records held by a public agency. The Middlesex County Sheriff's Office must respond within 10 business days. You can make your request by phone, in person, or by mail.
Contact the Records Access Officer at 978-667-1711 during business hours, Monday through Friday, 8:30 AM to 4:30 PM. Mail requests go to the Records Division at 269 Treble Cove Road, Billerica, MA 01862. The types of records you can get include inmate custody status, booking information, housing assignments, and release details. Records that are not available through this process include police reports, court documents, medical files, and CORI data. Those come from other agencies.
Fees are straightforward. The first four hours of search time are free. After that, the office can charge up to $25 per hour for staff time. Copies cost $0.05 per page. Electronic records sent by email have no charge when they already exist in that format. The mass.gov public records page has forms and guides that can help you put a request together.
Note: Some records are exempt from public access under M.G.L. Chapter 4, Section 7, which covers law enforcement materials and personal data.
Visiting Inmates in Middlesex County
Visiting hours at the Middlesex Jail depend on which housing unit the inmate is in. Each visit lasts 45 minutes. All visits are non-contact. You must be on the inmate's approved visitor list before you can come in. Getting approved takes some time, so plan ahead.
The jail also offers video visits through Securus Technologies. This lets people connect from home without driving to Billerica. Video visits can be set up online through the Securus website or app. For families who live far from the facility, this makes it much easier to stay in touch with someone in the Middlesex County inmate population.
Phone calls from the jail go through Securus as well. Inmates can place calls to approved numbers on their list. If you want to set up a prepaid phone account, call Securus at 1-800-844-6591. Prepaid accounts let you manage costs and keep the line open for calls from the facility.
Middlesex County Inmate Population Services
The Middlesex County Sheriff's Office runs several programs for inmates. Substance use treatment is a big focus. The jail offers medication-assisted treatment using Vivitrol and Suboxone. This is part of a broader push in Massachusetts to address the opioid crisis inside jails. Reentry services help inmates get ready to leave. Staff work with people on housing, job plans, and community connections before release.
Education programs are available too. Inmates can work toward a HiSET diploma, which is the Massachusetts version of a GED. Vocational training programs teach practical skills. These programs aim to cut the chance of someone coming back to jail after release. The three-year return rate in Massachusetts is about 32%, and counties with strong programs tend to see better outcomes for their inmate population.
Sending money to an inmate is done through Access Corrections at accesscorrections.com or by calling 866-345-1884. There is also a kiosk in the jail lobby. The limit is $300 per transaction.
Mail goes to the inmate by name and ID number at 269 Treble Cove Road, Billerica, MA 01862. All mail is screened by staff before delivery.
Court Records and Middlesex County Inmates
Court records are separate from jail records. The Massachusetts Trial Court runs masscourts.org, where you can search criminal dockets by name or case number. This shows charges, court dates, and outcomes for cases in Middlesex County courts. It does not show current custody status. For that, use the sheriff's inmate roster or call the jail.
Criminal history checks work differently in Massachusetts. CORI records are handled by the Department of Criminal Justice Information Services. You can check your own record through iCORI for $25. Under M.G.L. Chapter 276, Section 100A, some criminal records can be sealed after a waiting period. Misdemeanors can be sealed after three years. Felonies take seven years. Once sealed, those records will not show up in a public search of the Middlesex County inmate population or any CORI check.
How Middlesex County Fits the State System
Massachusetts splits its inmates between state prisons and county jails. State prisons hold people with felony sentences over 2.5 years. The Department of Correction runs those. County jails like the one in Middlesex hold pre-trial detainees and people with shorter sentences. The DOC inmate search covers state facilities only. It will not show anyone held at the Middlesex County jail.
One thing to know about Middlesex County is that VINELink does not cover this facility. VINELink works for DOC prisons and Essex County, but not for Middlesex. If you want custody change alerts for someone at the Billerica jail, you will need to check the roster yourself or call the jail on a regular basis. The Massachusetts Sheriffs' Association keeps a list of all 14 county sheriff offices and their contact details.
Cities in Middlesex County
Middlesex County is the most populous county in Massachusetts. Several cities within its borders have their own pages with local details about the inmate population and how to search.
All residents of these cities who are held at the county level go to the Middlesex Jail and House of Correction in Billerica.
Nearby Counties
These counties border Middlesex County. Each one has its own sheriff and jail. If you are not sure which county holds a person, check the town where they were arrested. That determines which facility they go to.