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.
San Juan County, Washington, has about 19,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in San Juan County is held at the county jail, run by the San Juan 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: San Juan County public records, San Juan County arrest records, San Juan County warrants, San Juan County criminal records, San Juan County court records, Washington arrest records and Washington inmate search.
Finding Someone in Custody in San Juan County
A person kept in custody after an arrest in San Juan County is held at the county jail, run by the San Juan County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the San Juan County Sheriff's Office at sanjuansheriff.org (page title: About San Juan County Sheriff and Jail Inmate Locator), 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 San Juan County Jail by the Numbers
On an average day in 2021 the jail held about 8 people, down from about 12 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 12 beds, and it ran at 99 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
San Juan County has about 19,000 residents (2024 Census Bureau estimate), so the jail holds about 4 people for every 10,000 residents.
Who Books People Into the San Juan County Jail
The San Juan County Sheriff's Office makes the arrests that end in a booking in San Juan County.
The San Juan County Sheriff's Office reported 212 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 San Juan County 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 San Juan 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 San Juan County?
Look on the custody page of the San Juan County Sheriff's Office at sanjuansheriff.org. It covers people booked into the county jail.
How many people are in the San Juan County jail?
About 8 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 12 beds.
Where do people sentenced to prison in San Juan County go?
To a facility of the Washington State Department of Corrections; its inmate locator is at doc.wa.gov.
Is this the official San Juan 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.