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 on September 23, 2026.
Morris County, New Jersey, has about 523,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Morris County is held at the county jail, run by the Morris 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: Morris County public records, Morris County arrest records, Morris County warrants, Morris County criminal records, Morris County court records, New Jersey arrest records and New Jersey inmate search.
Finding Someone in Custody in Morris County
The county jail, run by the Morris County Sheriff's Office, holds everyone kept in custody after an arrest in Morris County, from every agency.
SearchSystems opened and checked the jail page of the Morris County Sheriff's Office at morriscountynj.gov/Departments/Jail (page title: Jail | Morris County, NJ), phone 973-631-5412, which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at 973-631-5412.
The Morris County Jail by the Numbers
On an average day in 2023 the jail held about 240 people, up from about 190 in 2019. Its rated capacity in 2023 was 524 beds, and it ran at 45 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Morris County has about 523,000 residents (2024 Census Bureau estimate), so the jail holds about 5 people for every 10,000 residents.
Who Books People Into the Morris County Jail
The Morris County Sheriff's Office and the agencies that report for Morristown (township), Morristown, Dover, Madison, Florham Park, Lincoln Park and 18 more cities make the arrests that end in a booking in Morris County.
The FBI's agency list also places these agencies in Morris County: Prosecutor in Morris County and the Morris County Park Police (other agency); the Morris County State Police (state police).
The largest arrest counts reported to the FBI were Morristown's 517 for 2025, Hanover Township's 511 for 2025 and Roxbury Township's 330 for 2025.
Together, the 36 agencies in Morris County with all twelve months of 2025 on file reported 4,472 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 Morris County 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 Morris County?
Ask the Morris County Sheriff's Office at 973-631-5412; its jail page SearchSystems verified is at morriscountynj.gov/Departments/Jail.
How many people are in the Morris County jail?
About 240 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 524 beds.
What is the phone number for the Morris County jail?
973-631-5412, the number on the page of the Morris County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Morris 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 Morris County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.