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 24, 2026 and September 30, 2026.
Sullivan County, New Hampshire, has about 44,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sullivan County is held at the county jail, run by the Sullivan 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: Sullivan County public records, Sullivan County arrest records, Sullivan County warrants, Sullivan County criminal records, Sullivan County court records, New Hampshire arrest records and New Hampshire inmate search.
Finding Someone in Custody in Sullivan County
The county jail, run by the Sullivan County Sheriff's Office, holds everyone kept in custody after an arrest in Sullivan County, from every agency.
SearchSystems opened and checked the jail page of the Sullivan County Sheriff's Office at sullivancountynh.gov/157/Sheriff (page title: Sullivan County Sheriff's Office | Sullivan County, NH), phone 603-863-4200, 14 Main Street Suite 2 Newport, NH 03773, which answered when SearchSystems opened it on September 24, 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 603-863-4200.
The Sullivan County Jail by the Numbers
On an average day in 2019 the jail held about 56 people. Its rated capacity in 2019 was 168 beds, and it ran at 33 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Sullivan County has about 44,000 residents (2024 Census Bureau estimate), so the jail holds about 13 people for every 10,000 residents.
Who Books People Into the Sullivan County Jail
The Sullivan County Sheriff's Office and the agency that reports for Claremont make the arrests that end in a booking in Sullivan County.
The FBI's agency list also places one more agency in Sullivan County: the Sullivan County State Police (state police).
The largest arrest counts reported to the FBI were Claremont's 512 for 2025, Newport's 227 for 2025 and Charlestown's 67 for 2025.
Together, the 11 agencies in Sullivan County with all twelve months of 2025 on file reported 902 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 Sullivan County 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 Sullivan County serves the sentence in a facility of the New Hampshire Department of Corrections, whose inmate locator is at business.nh.gov/inmate_locator.
Frequently Asked Questions
How do I find an inmate in Sullivan County?
Ask the Sullivan County Sheriff's Office at 603-863-4200; its jail page SearchSystems verified is at sullivancountynh.gov/157/Sheriff.
How many people are in the Sullivan County jail?
About 56 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 168 beds.
What is the phone number for the Sullivan County jail?
603-863-4200, the number on the page of the Sullivan County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Sullivan County go?
To a facility of the New Hampshire Department of Corrections; its inmate locator is at business.nh.gov/inmate_locator.
Is this the official Sullivan 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.