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 30, 2026.
Union Gap, Washington, in Yakima County, has about 6,600 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Union Gap is held at the county jail, run by the Yakima 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: Union Gap public records, Yakima County inmate search, Union Gap arrest records, Union Gap warrants, Union Gap criminal records, Union Gap court records, Washington arrest records and Washington inmate search.
Finding Someone in Custody in Union Gap
The county jail, run by the Yakima County Sheriff's Office, holds everyone kept in custody after an arrest in Union Gap, from every agency.
SearchSystems opened and checked the jail page of the Yakima County Sheriff's Office at yakimacounty.us/1891/Jail-Records (page title: Jail Records | Yakima County, WA), 128 North 2nd Street, Yakima, WA 98901, which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster.
The Yakima County Jail by the Numbers
On an average day in 2024 the jail held about 580 people, down from about 1,080 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,069 beds, and it ran at 60 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Yakima County has about 259,000 residents (2024 Census Bureau estimate), so the jail holds about 23 people for every 10,000 residents.
Who Books People Into the Yakima County Jail
The Yakima County Sheriff's Office and the agency that reports for Union Gap (filed by the FBI as Union Gap Police Department) make the arrests that end in a booking in and around Union Gap.
The largest arrest counts reported to the FBI were Yakima's 3,777 for 2025, Mabton's 1,166 for 2025 and Granger's 1,166 for 2025.
Together, the ten agencies in Yakima County with all twelve months of 2025 on file reported 9,323 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 Union Gap arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Washington State Department of Corrections lists its inmates at doc.wa.gov/records/incarcerated-data-search/incarcerated-search.
Frequently Asked Questions
How do I find an inmate in Union Gap?
Ask the Yakima County Sheriff's Office; its jail page SearchSystems verified is at yakimacounty.us/1891/Jail-Records.
How many people are in the Yakima County jail?
About 580 on an average day in 2024, the latest year in the Vera Institute's jail data, against a rated capacity of 1,069 beds.
Where do people sentenced to prison in Yakima County go?
To a facility of the Washington State Department of Corrections; its inmate locator is at doc.wa.gov.
Is this the official Union Gap 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.