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 4, 2026.
Warren County, New Jersey, has about 112,000 residents (2024 Census Bureau estimate), and arrests there are reported to the FBI by the Warren County Sheriff's Office, 13 city agencies and two campus, state or other agencies. An arrest leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the County Prosecutor files charges, a case in the Superior Court of New Jersey, Warren County. This guide says who keeps each one, what it costs and who may see it, with the arrest counts each agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies, cities and common questions.
Related guides: Warren County public records, New Jersey arrest records, New Jersey inmate search and New Jersey criminal records.
Who Makes Arrests in Warren County
The Warren County Sheriff's Office is the county agency that reports arrests to the FBI for Warren County. It reported 202 arrests for 2025.
The FBI lists six cities in Warren County with a reporting agency of their own, with the Census population and what each reported:
- Phillipsburg, 15,393 residents: 697 arrests reported for 2025.
- Hackettstown, 10,182 residents: 103 arrests reported for 2025.
- Washington, 7,375 residents: 79 arrests reported for 2025.
- Washington (township), 7,375 residents: 59 arrests reported for 2025.
- Belvidere, 2,545 residents: 124 arrests reported for 2025.
- Alpha, 2,357 residents: 24 arrests reported for 2025.
A city on that list is reported separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
The FBI's agency list also places these agencies in Warren County: Prosecutor in Warren County (other); the Warren County State Police (state police).
How Many Arrests Each Agency Reports in Warren County
Each agency reports its arrests to the FBI by month, and the FBI publishes them on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Phillipsburg: 697 for 2025, 848 for 2024, 596 for 2023, 486 for 2022, 522 for 2020 and 833 for 2019; 2021 is missing months.
- Warren County Sheriff's Office: 202 for 2025, 288 for 2024, 238 for 2023, 104 for 2022 and 411 for 2019; 2020 and 2021 are missing months.
- Mansfield Township: 128 for 2025, 149 for 2024, 144 for 2023, 108 for 2022, 172 for 2020 and 290 for 2019; 2021 is missing months.
- Belvidere: 124 for 2025, 145 for 2024, 139 for 2023, 65 for 2022, 52 for 2020 and 79 for 2019; 2021 is missing months.
- Pohatcong Township: 118 for 2025, 125 for 2024, 99 for 2023, 118 for 2022 and 405 for 2019; 2020 and 2021 are missing months.
- Hackettstown: 103 for 2025, 108 for 2024, 114 for 2023, 80 for 2022, 159 for 2020 and 500 for 2019; 2021 is missing months.
- Greenwich Township: 91 for 2025, 111 for 2024, 170 for 2023, 93 for 2022, 124 for 2020 and 168 for 2019; 2021 is missing months.
- Washington: 79 for 2025, 86 for 2024, 91 for 2023, 97 for 2022, 137 for 2020 and 238 for 2019; 2021 is missing months.
- Lopatcong Township: 71 for 2025, 69 for 2024, 60 for 2023, 148 for 2020 and 173 for 2019; 2021 and 2022 are missing months.
- Washington (township): 59 for 2025, 83 for 2024, 52 for 2023, 89 for 2022, 130 for 2020 and 263 for 2019; 2021 is missing months.
- Independence Township: 40 for 2025, 58 for 2024, 44 for 2023, 36 for 2022, 74 for 2020 and 139 for 2019; 2021 is missing months.
- Blairstown Township: 26 for 2025, 25 for 2024, 28 for 2023, 26 for 2022, 54 for 2020 and 109 for 2019; 2021 is missing months.
Together, the 14 agencies with all twelve months of 2025 on file reported 1,781 arrests that year. The same agencies with both 2025 and 2024 complete reported 1,781 in 2025 against 2,145 in 2024, down 17 percent.
Booking: Where People Arrested in Warren County Are Held
The county jail is where a person arrested in Warren County and kept in custody ends up, whichever agency made the arrest, though a city department may hold someone in its own cells first and a person cited and released at the scene is never booked. The jail's record of each person held, with the charges, is a public record of the arrest, and once the person is released or sentenced the record continues in the court file.
On an average day in 2020 the jail held about 98 people, up from about 78 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 180 beds, and it ran at 43 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the jail page of the Warren County Sheriff's Office at warrencountynj.gov/government/warren-county-sheriff-s-office (page title: Warren County Sheriff's Office | Warren County, NJ), which answered when SearchSystems opened it on October 4, 2026.
A sentence of more than a year is served in state prison; the New Jersey Department of Corrections lists its inmates at www20.state.nj.us/DOC_Inmate/inmatefinder?i=I.
How to Find Out About an Arrest in Warren County
An arrest in Warren County can be traced in two places, depending on where the case stands: the case index of the Superior Court of New Jersey, Warren County, which shows whether charges were filed and the next court date (the court records page SearchSystems verified is at warrencountynj.gov/government/warren-county-clerk-s-office, phone 908-475-6211); the County Prosecutor, which decides whether an arrest becomes a charge (its page is at warrencountynj.gov/government/prosecutor).
Statewide, New Jersey Courts Public Access is the Judiciary's free online case search for civil and criminal cases.
New Jersey does not let the public search another person's statewide criminal history. The record kept by the New Jersey State Police goes to the person it belongs to and to employers and agencies the law authorizes; for everyone else the court's own case index is the public record of an arrest that led to a charge.
Getting a Copy of an Arrest Record in Warren County
An arrest report belongs to the agency whose officer wrote it, and that agency releases it, not the court or the jail. Under the Open Public Records Act the agency must answer within 7 business days, and it may charge copying at 5 cents a page for letter size.
- An arrest by the Warren County Sheriff's Office: ask its records unit.
- An arrest in Phillipsburg, Hackettstown, Washington, Washington (township), Belvidere or Alpha: the records unit of the agency that reports for that city; the city guides linked above name each city's records office.
- An arrest by Prosecutor in Warren County or the Warren County State Police: the records office of the agency involved.
- A defendant who has been charged gets the report through the case: the County Prosecutor handles discovery for pending cases.
- The court file of a case that was filed: the Superior Court of New Jersey, Warren County, through the court records page at warrencountynj.gov, phone 908-475-6211.
- Your own statewide record: a fingerprint-based request to the State Police.
Cities in Warren County: Who Reports the Arrests
The FBI lists a separate arrest reporting agency for six of the five cities in Warren County: Phillipsburg, Hackettstown, Washington, Washington (township), Belvidere and Alpha. The FBI's list also carries the Lopatcong Township Police Department, Mansfield Township Police Department, Warren County, the Oxford Township Police Department and four more as city agencies in Warren County; Lopatcong Township, Mansfield Township, Oxford Township and four more are not among the cities above.
Wherever in the county the arrest happens, a person kept in custody goes to the county jail and the case goes to the Superior Court of New Jersey, Warren County.
SearchSystems has a guide to the offices of these cities in Warren County, with the 2024 Census Bureau population; a city with its own arrest records guide opens there:
- Phillipsburg (15,393)
- Hackettstown (10,182)
Frequently Asked Questions
How many arrests are made in Warren County each year?
Phillipsburg reported 697 arrests to the FBI for 2025, and the 14 agencies with every month of 2025 on file reported 1,781 between them.
How do I find out if someone is in jail in Warren County?
Ask the Warren County Sheriff's Office; its jail page SearchSystems verified is at warrencountynj.gov.
Where are people arrested in Warren County booked?
Those kept in custody go to the county jail, run by the Warren County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in Warren County?
The court files of criminal cases in the Superior Court of New Jersey, Warren County are public and can be looked up through the court. The statewide criminal history kept by the New Jersey State Police is not public; you can get your own. The arrest report itself is released by the agency that made the arrest, under the Open Public Records Act.
How do I get a copy of an arrest report in Warren County?
From the agency that made the arrest: the Warren County Sheriff's Office for its own arrests, or the agency that reports for the city where it happened. Under the Open Public Records Act the answer is due within 7 business days.
Is this the official Warren 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.