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.
Seneca County, New York, has about 33,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Seneca County is held at the county jail, run by the Seneca 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: Seneca County public records, Seneca County arrest records, Seneca County warrants, Seneca County police reports, New York arrest records and New York inmate search.
Finding Someone in Custody in Seneca County
A person kept in custody after an arrest in Seneca County is held at the county jail, run by the Seneca County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Seneca County Sheriff's Office at sheriff.senecacountyny.gov (page title: Seneca County Sheriff, New York | A New York State Sheriffs' Association Accredited Agency), which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster.
The Seneca County Jail by the Numbers
So far in 2026 the jail has held about 63 people on an average day, up from about 60 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 116 beds, and it ran at 51 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Seneca County has about 33,000 residents (2024 Census Bureau estimate), so the jail holds about 19 people for every 10,000 residents.
Who Books People Into the Seneca County Jail
The Seneca County Sheriff's Office and the agencies that report for Waterloo and Interlaken make the arrests that end in a booking in Seneca County.
The largest arrest counts reported to the FBI were Seneca Falls Town's 418 for 2025, the Seneca County Sheriff's Office's 299 for 2025 and Waterloo's 124 for 2025.
Together, the four agencies in Seneca County with all twelve months of 2025 on file reported 848 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 Seneca 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 Seneca County?
Ask the Seneca County Sheriff's Office; its jail page SearchSystems verified is at sheriff.senecacountyny.gov.
How many people are in the Seneca County jail?
About 63 on an average day so far in 2026, against a rated capacity of 116 beds.
Where do people sentenced to prison in Seneca 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 Seneca 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.