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.
Gilliam County, Oregon, has about 2,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Gilliam County is held at the county jail, run by the Gilliam 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: Gilliam County public records, Gilliam County arrest records, Gilliam County warrants, Gilliam County criminal records, Gilliam County court records, Oregon arrest records and Oregon inmate search.
Finding Someone in Custody in Gilliam County
A person kept in custody after an arrest in Gilliam County is held at the county jail, run by the Gilliam County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Gilliam County Sheriff's Office at gilliamcountyor.gov/government/offices/sheriff/index.php (page title: Gilliam County, OR), phone 541-351-9530, 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 541-351-9530.
The Gilliam County Jail by the Numbers
On an average day in 2023 the jail held about 5 people, down from about 5 in 2019. Its rated capacity in 2023 was 6 beds, and it ran at 78 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Gilliam County has about 2,000 residents (2024 Census Bureau estimate), so the jail holds about 24 people for every 10,000 residents.
Who Books People Into the Gilliam County Jail
The Gilliam County Sheriff's Office makes the arrests that end in a booking in Gilliam County.
The FBI's agency list also places these agencies in Gilliam County: the Gilliam County Liquor Commission (state agency); the Gilliam County State Police (state police).
The Gilliam County Sheriff's Office reported 62 arrests to the FBI for 2025. 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 Gilliam 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 Oregon Department of Corrections lists its inmates at oregon.gov/doc/victim-services/pages/offender-search.aspx.
Frequently Asked Questions
How do I find an inmate in Gilliam County?
Ask the Gilliam County Sheriff's Office at 541-351-9530; its jail page SearchSystems verified is at gilliamcountyor.gov.
How many people are in the Gilliam County jail?
About 5 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 6 beds.
What is the phone number for the Gilliam County jail?
541-351-9530, the number on the page of the Gilliam County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Gilliam County go?
To a facility of the Oregon Department of Corrections; its inmate locator is at oregon.gov.
Is this the official Gilliam 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.