Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and October 2, 2026.
Westfield, Massachusetts, in Hampden County, has about 40,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Westfield is held at the county jail, run by the Hampden County Sheriff’s Department - MA POST Commission, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Westfield public records, Hampden County inmate search, Westfield arrest records, Westfield warrants, Westfield criminal records, Westfield court records, Massachusetts arrest records and Massachusetts inmate search.
Finding Someone in Custody in Westfield
A person kept in custody after an arrest in Westfield is held at the county jail, run by the Hampden County Sheriff’s Department - MA POST Commission, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Hampden County Sheriff’s Department - MA POST Commission at mapostcommission.gov/current-agency/hampden-county-sheriffs-department (page title: Hampden County Sheriff’s Department | MA POST Commission), 84 State Street, 2nd Floor, Boston, MA 02109, which answered when SearchSystems opened it on September 30, 2026.
That page is the office's jail information page rather than a roster.
The Hampden County Jail by the Numbers
On an average day in 2025 the jail held about 1,100 people, up from about 1,080 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 2,346 beds, and it ran at 39 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Hampden County has about 464,000 residents (2024 Census Bureau estimate), so the jail holds about 24 people for every 10,000 residents.
Who Books People Into the Hampden County Jail
The Hampden County Sheriff’s Department - MA POST Commission and the agency that reports for Westfield (filed by the FBI as Westfield Police Department) make the arrests that end in a booking in and around Westfield.
The FBI's agency list also places five campus police departments and one state police unit in Hampden County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Springfield's 2,994 for 2025, Holyoke's 2,128 for 2025 and Blandford's 1,188 for 2025.
Together, the 22 agencies in Hampden County with all twelve months of 2025 on file reported 9,963 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Westfield arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Hampden County serves the sentence in a facility of the Massachusetts Department of Correction, whose inmate locator is at mass.gov/how-to/find-someone-housed-in-a-massachusetts-prison.
Frequently Asked Questions
How do I find an inmate in Westfield?
Ask the Hampden County Sheriff’s Department - MA POST Commission; its jail page SearchSystems verified is at mapostcommission.gov.
How many people are in the Hampden County jail?
About 1,100 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 2,346 beds.
Where do people sentenced to prison in Hampden County go?
To a facility of the Massachusetts Department of Correction; its inmate locator is at mass.gov.
Is this the official Westfield website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.