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.
Oak Harbor, Washington, in Island County, has about 24,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Oak Harbor is held at the county jail, run by the Island 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: Oak Harbor public records, Island County inmate search, Oak Harbor arrest records, Oak Harbor warrants, Oak Harbor criminal records, Oak Harbor court records, Washington arrest records and Washington inmate search.
Finding Someone in Custody in Oak Harbor
The county jail, run by the Island County Sheriff's Office, holds everyone kept in custody after an arrest in Oak Harbor, from every agency.
SearchSystems opened and checked the custody page of the Island County Sheriff's Office at islandcounty.net/sheriff (page title: Island County Jail, WA Inmate Roster Locator, Visitations, Sheriff), a site that blocks automated checks (HTTP 403), so open it in a browser.
That page is the place to look for someone booked recently. A person cited and released at the scene, or held only a few hours by a city department, will not be on it.
The Island County Jail by the Numbers
On an average day in 2021 the jail held about 40 people, down from about 61 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 62 beds, and it ran at 99 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Island County has about 86,000 residents (2024 Census Bureau estimate), so the jail holds about 5 people for every 10,000 residents.
Who Books People Into the Island County Jail
The Island County Sheriff's Office and the agency that reports for Oak Harbor (filed by the FBI as Oak Harbor Police Department) make the arrests that end in a booking in and around Oak Harbor.
The largest arrest counts reported to the FBI were Oak Harbor's 598 for 2025, the Island County Sheriff's Office's 416 for 2025 and Langley's 3 for 2025.
Together, the three agencies in Island County with all twelve months of 2025 on file reported 1,017 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 Oak Harbor arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Island County serves the sentence in a facility of the Washington State Department of Corrections, whose inmate locator is at doc.wa.gov/records/incarcerated-data-search/incarcerated-search.
Frequently Asked Questions
How do I find an inmate in Oak Harbor?
Look on the custody page of the Island County Sheriff's Office at islandcounty.net/sheriff. It covers people booked into the county jail.
How many people are in the Island County jail?
About 40 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 62 beds.
Where do people sentenced to prison in Island County go?
To a facility of the Washington State Department of Corrections; its inmate locator is at doc.wa.gov.
Is this the official Oak Harbor 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.