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.
Snohomish County, Washington, has about 864,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Snohomish County is held at the county jail, run by the Snohomish 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: Snohomish County public records, Snohomish County arrest records, Snohomish County warrants, Snohomish County criminal records, Snohomish County court records, Washington arrest records and Washington inmate search.
Finding Someone in Custody in Snohomish County
The county jail, run by the Snohomish County Sheriff's Office, holds everyone kept in custody after an arrest in Snohomish County, from every agency.
SearchSystems opened and checked the jail page of the Snohomish County Sheriff's Office at snohomishcountywa.gov/3310/Requesting-Jail-Records (page title: Requesting Jail Records | Snohomish County, WA), phone 425-388-3526, 3000 Rockefeller Ave., M/S 509 Everett, WA 98201, which answered when SearchSystems opened it on September 23, 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 425-388-3526.
The Snohomish County Jail by the Numbers
On an average day in 2023 the jail held about 520 people, down from about 1,010 in 2019. Its rated capacity in 2023 was 1,244 beds, and it ran at 42 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Snohomish County has about 864,000 residents (2024 Census Bureau estimate), so the jail holds about 6 people for every 10,000 residents.
Who Books People Into the Snohomish County Jail
The Snohomish County Sheriff's Office and the agencies that report for Everett, Marysville, Edmonds, Lynnwood, Lake Stevens, Mountlake Terrace and 13 more cities make the arrests that end in a booking in Snohomish County.
The FBI's agency list also places one more agency in Snohomish County: Snohomish County Auto Theft Task Force (other agency).
The Bothell Police Department is listed by the FBI across two counties including Snohomish County, so its arrests are not broken out for Snohomish County here.
The largest arrest counts reported to the FBI were Everett's 4,755 for 2025, the Snohomish County Sheriff's Office's 3,397 for 2025 and Lynnwood's 2,767 for 2025.
Together, the 16 agencies in Snohomish County with all twelve months of 2025 on file reported 17,726 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 Snohomish 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 Snohomish 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 Snohomish County?
Ask the Snohomish County Sheriff's Office at 425-388-3526; its jail page SearchSystems verified is at snohomishcountywa.gov.
How many people are in the Snohomish County jail?
About 520 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 1,244 beds.
What is the phone number for the Snohomish County jail?
425-388-3526, the number on the page of the Snohomish County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Snohomish County go?
To a facility of the Washington State Department of Corrections; its inmate locator is at doc.wa.gov.
Is this the official Snohomish 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.