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.
Sierra County, California, has about 3,100 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sierra County is held at the county jail, run by the Sierra 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: Sierra County public records, Sierra County arrest records, Sierra County warrants, Sierra County police reports, Sierra County property records, California arrest records and California inmate search.
Finding Someone in Custody in Sierra County
The county jail, run by the Sierra County Sheriff's Office, holds everyone kept in custody after an arrest in Sierra County, from every agency.
SearchSystems opened and checked the jail page of the Sierra County Sheriff's Office at sierracounty.ca.gov/m/directory/department?did=27 (page title: Staff Directory, Sheriff | Coroner), phone 530-289-3700, 100 Courthouse Sq., 1st Floor P O Box 66 Downieville, CA 95936, Monday - Friday 9:00 am - 5:00 pm, which answered when SearchSystems opened it on September 30, 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 530-289-3700.
The Sierra County Jail by the Numbers
On an average day in 2015 the jail held about 2 people. Its rated capacity in 2015 was 14 beds, and it ran at 14 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Sierra County has about 3,100 residents (2024 Census Bureau estimate), so the jail holds about 6 people for every 10,000 residents.
Who Books People Into the Sierra County Jail
The Sierra County Sheriff's Office makes the arrests that end in a booking in Sierra County.
The FBI's agency list also places one more agency in Sierra County: Union Pacific Railroad in Sierra County (other agency).
The Sierra County Sheriff's Office reported 33 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 Sierra 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 Sierra County serves the sentence in a facility of the California Department of Corrections and Rehabilitation, whose inmate locator is at cdcr.ca.gov/search.
Frequently Asked Questions
How do I find an inmate in Sierra County?
Ask the Sierra County Sheriff's Office at 530-289-3700; its jail page SearchSystems verified is at sierracounty.ca.gov.
How many people are in the Sierra County jail?
About 2 on an average day in 2015, the latest year in the Vera Institute's jail data, against a rated capacity of 14 beds.
What is the phone number for the Sierra County jail?
530-289-3700, the number on the page of the Sierra County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Sierra 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 Sierra 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.