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.
Sunnyvale, California, in Santa Clara County, has about 157,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sunnyvale is held at the county jail, run by the Santa Clara 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: Sunnyvale public records, Santa Clara County inmate search, Sunnyvale arrest records, Sunnyvale warrants, Sunnyvale criminal records, Sunnyvale court records, California arrest records and California inmate search.
Finding Someone in Custody in Sunnyvale
The county jail, run by the Santa Clara County Sheriff's Office, holds everyone kept in custody after an arrest in Sunnyvale, from every agency.
SearchSystems opened and checked the jail page of the Santa Clara County Sheriff's Office at sheriff.santaclaracounty.gov/home (page title: Office of the Sheriff | County of Santa Clara), a site that blocks automated checks (HTTP 403), so open it in a browser.
That page is the office's jail information page rather than a roster.
The Santa Clara County Jail by the Numbers
On an average day in 2025 the jail held about 2,740 people, down from about 3,280 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 3,932 beds, and it ran at 75 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Santa Clara County has about 1.9 million residents (2024 Census Bureau estimate), so the jail holds about 14 people for every 10,000 residents.
Who Books People Into the Santa Clara County Jail
The Santa Clara County Sheriff's Office and the agency that reports for Sunnyvale (filed by the FBI as Sunnyvale Police Department) make the arrests that end in a booking in and around Sunnyvale.
The FBI's agency list also places one state agency, three other agencies, three state police units and four campus police departments in Santa Clara County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were San Jose's 15,093 for 2025, Santa Clara's 2,383 for 2025 and Sunnyvale's 1,950 for 2025.
Together, the 14 agencies in Santa Clara County with all twelve months of 2025 on file reported 27,749 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 Sunnyvale arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the California Department of Corrections and Rehabilitation lists its inmates at cdcr.ca.gov/search.
Frequently Asked Questions
How do I find an inmate in Sunnyvale?
Ask the Santa Clara County Sheriff's Office; its jail page SearchSystems verified is at sheriff.santaclaracounty.gov/home.
How many people are in the Santa Clara County jail?
About 2,740 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 3,932 beds.
Where do people sentenced to prison in Santa Clara County go?
To a facility of the California Department of Corrections and Rehabilitation; its inmate locator is at cdcr.ca.gov/search.
Is this the official Sunnyvale 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.