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.
Sussex County, New Jersey, has about 147,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sussex County is held at the county jail, run by the Sussex 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: Sussex County public records, Sussex County arrest records, Sussex County warrants, Sussex County police reports, Sussex County property records, New Jersey arrest records and New Jersey inmate search.
Finding Someone in Custody in Sussex County
The county jail, run by the Sussex County Sheriff's Office, holds everyone kept in custody after an arrest in Sussex County, from every agency.
SearchSystems opened and checked the jail page of the Sussex County Sheriff's Office at sussex.nj.us/161/Sussex-County-Sheriffs-Office (page title: Sussex County Sheriff's Office | Sussex County, NJ), phone 973-579-0850, 39 High Street Newton, NJ 07860, 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 973-579-0850.
The Sussex County Jail by the Numbers
On an average day in 2021 the jail held about 52 people, down from about 110 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 170 beds, and it ran at 65 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Sussex County has about 147,000 residents (2024 Census Bureau estimate), so the jail holds about 4 people for every 10,000 residents.
Who Books People Into the Sussex County Jail
The Sussex County Sheriff's Office and the agencies that report for Hopatcong, Newton, Franklin, Stanhope, Hamburg, Ogdensburg and one more cities make the arrests that end in a booking in Sussex County.
The FBI's agency list also places these agencies in Sussex County: Prosecutor in Sussex County (other agency); the Sussex County State Police (state police).
The largest arrest counts reported to the FBI were Newton's 301 for 2025, the Sussex County Sheriff's Office's 246 for 2020 and Sparta Township's 159 for 2025.
Together, the nine agencies in Sussex County with all twelve months of 2025 on file reported 870 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 Sussex 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 Sussex County?
Ask the Sussex County Sheriff's Office at 973-579-0850; its jail page SearchSystems verified is at sussex.nj.us.
How many people are in the Sussex County jail?
About 52 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 170 beds.
What is the phone number for the Sussex County jail?
973-579-0850, the number on the page of the Sussex County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Sussex 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 Sussex 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.