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 September 26, 2026.
Dunellen, New Jersey, in Middlesex County, has about 8,400 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Dunellen is held at the county jail, run by the Middlesex County Sheriff's Office, 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: Dunellen public records, Middlesex County inmate search, Dunellen arrest records, Dunellen warrants, Dunellen police reports, Dunellen property records, New Jersey arrest records and New Jersey inmate search.
Finding Someone in Custody in Dunellen
A person kept in custody after an arrest in Dunellen is held at the county jail, run by the Middlesex County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Middlesex County Sheriff's Office at middlesexcountynj.gov/government/departments/department-of-public-s... (page title: Inmate Lookup | Middlesex County NJ), which answered when SearchSystems opened it on September 23, 2026.
Someone booked recently shows on that page; someone cited and released at the scene, or held a few hours at a city station, does not.
The Middlesex County Jail by the Numbers
On an average day in 2023 the jail held about 560 people, up from about 530 in 2019. Its rated capacity in 2023 was 1,436 beds, and it ran at 39 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Middlesex County has about 890,000 residents (2024 Census Bureau estimate), so the jail holds about 6 people for every 10,000 residents.
Who Books People Into the Middlesex County Jail
The Middlesex County Sheriff's Office and the agency that reports for Dunellen (filed by the FBI as Dunellen Police Department) make the arrests that end in a booking in and around Dunellen.
The FBI's agency list also places two campus police departments, one other agency and one state police unit in Middlesex County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Perth Amboy's 1,548 for 2024, Edison Township's 1,517 for 2025 and Woodbridge Township's 1,193 for 2025.
Together, the 21 agencies in Middlesex County with all twelve months of 2025 on file reported 7,840 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 Dunellen arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the New Jersey Department of Corrections lists its inmates at www20.state.nj.us/DOC_Inmate/inmatefinder?i=I.
Frequently Asked Questions
How do I find an inmate in Dunellen?
Look on the custody page of the Middlesex County Sheriff's Office at middlesexcountynj.gov. It covers people booked into the county jail.
How many people are in the Middlesex County jail?
About 560 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 1,436 beds.
Where do people sentenced to prison in Middlesex County go?
To a facility of the New Jersey Department of Corrections; its inmate locator is at www20.state.nj.us/DOC_Inmate/inmatefinder?i=I.
Is this the official Dunellen 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.