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 September 25, 2026.
Hamilton, Ohio, in Butler County, has about 64,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Hamilton is held at the county jail, run by the Butler 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: Hamilton public records, Butler County inmate search, Hamilton arrest records, Hamilton warrants, Hamilton criminal records, Hamilton court records, Ohio arrest records and Ohio inmate search.
Finding Someone in Custody in Hamilton
The county jail, run by the Butler County Sheriff's Office, holds everyone kept in custody after an arrest in Hamilton, from every agency.
SearchSystems opened and checked the jail page of the Butler County Sheriff's Office at butlersheriff.org/jail-facilities (page title: Jail Facilities | Butler County Sheriff’s Office), which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster.
The Butler County Jail by the Numbers
On an average day in 2024 the jail held about 810 people, down from about 1,110 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,150 beds, and it ran at 71 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Butler County has about 400,000 residents (2024 Census Bureau estimate), so the jail holds about 20 people for every 10,000 residents.
Who Books People Into the Butler County Jail
The Butler County Sheriff's Office and the agency that reports for Hamilton (filed by the FBI as Hamilton Police Department) make the arrests that end in a booking in and around Hamilton.
The FBI's agency list also places these agencies in Butler County: Miami University (campus police); Butler County Metroparks (other agency).
The Sharonville Police Department is listed by the FBI across two counties including Butler County, so its arrests are not broken out for Butler County here.
The largest arrest counts reported to the FBI were Fairfield's 1,986 for 2025, Hamilton's 1,439 for 2025 and Middletown's 896 for 2024.
Together, the ten agencies in Butler County with all twelve months of 2025 on file reported 6,118 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 Hamilton arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Ohio Department of Rehabilitation and Correction lists its inmates at appgateway.drc.ohio.gov/OffenderSearch.
Frequently Asked Questions
How do I find an inmate in Hamilton?
Ask the Butler County Sheriff's Office; its jail page SearchSystems verified is at butlersheriff.org/jail-facilities.
How many people are in the Butler County jail?
About 810 on an average day in 2024, the latest year in the Vera Institute's jail data, against a rated capacity of 1,150 beds.
Where do people sentenced to prison in Butler County go?
To a facility of the Ohio Department of Rehabilitation and Correction; its inmate locator is at appgateway.drc.ohio.gov/OffenderSearch.
Is this the official Hamilton website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.