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.
Sullivan County, New York, has about 80,000 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 York arrest records and New York inmate search.
Finding Someone in Custody in Sullivan County
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, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Sullivan County Sheriff's Office at sullivanny.gov/Departments/Sheriff (page title: Sheriff's Office | Sullivan County NY), phone 845-794-7102, 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 845-794-7102.
The Sullivan County Jail by the Numbers
So far in 2026 the jail has held about 110 people on an average day, down from about 130 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 186 beds, and it ran at 69 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Sullivan County has about 80,000 residents (2024 Census Bureau estimate), so the jail holds about 14 people for every 10,000 residents.
Who Books People Into the Sullivan County Jail
The Sullivan County Sheriff's Office and the agencies that report for Monticello, Liberty and Woodridge 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 New York City Department of Environmental Police (other agency).
The largest arrest counts reported to the FBI were the Sullivan County Sheriff's Office's 768 for 2025, Liberty's 437 for 2025 and Monticello's 241 for 2025.
Together, the five agencies in Sullivan County with all twelve months of 2025 on file reported 1,598 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
A sentence of more than a year is served in state prison, not the jail; the New York State Department of Corrections and Community Supervision lists its inmates at nysdoccslookup.doccs.ny.gov.
Frequently Asked Questions
How do I find an inmate in Sullivan County?
Ask the Sullivan County Sheriff's Office at 845-794-7102; its jail page SearchSystems verified is at sullivanny.gov/Departments/Sheriff.
How many people are in the Sullivan County jail?
About 110 on an average day so far in 2026, against a rated capacity of 186 beds.
What is the phone number for the Sullivan County jail?
845-794-7102, 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 York State Department of Corrections and Community Supervision; its inmate locator is at nysdoccslookup.doccs.ny.gov.
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.