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.
Riverside County, California, has about 2.5 million residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Riverside County is held at the county jail, run by the Riverside 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: Riverside County public records, Riverside County arrest records, Riverside County warrants, Riverside County criminal records, Riverside County court records, California arrest records and California inmate search.
Finding Someone in Custody in Riverside County
The county jail, run by the Riverside County Sheriff's Office, holds everyone kept in custody after an arrest in Riverside County, from every agency.
SearchSystems opened and checked the custody page of the Riverside County Sheriff's Office at riversidesheriff.org/213/Inmate-Information (page title: Inmate Information | Riverside County Sheriff, CA), which answered when SearchSystems opened it on September 23, 2026.
Someone booked recently shows on that page; someone cited and released at the scene, or held a few hours at a city station, does not.
The Riverside County Jail by the Numbers
On an average day in 2025 the jail held about 3,760 people, down from about 3,790 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 4,975 beds, and it ran at 76 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Riverside County has about 2.5 million residents (2024 Census Bureau estimate), so the jail holds about 15 people for every 10,000 residents.
Who Books People Into the Riverside County Jail
The Riverside County Sheriff's Office and the agencies that report for Riverside, Moreno Valley, Corona, Menifee, Murrieta, Temecula and 22 more cities make the arrests that end in a booking in Riverside County.
The FBI's agency list also places three campus police departments, seven state police units, two state agencies and one other agency in Riverside County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Riverside's 8,041 for 2025, Corona's 3,858 for 2025 and the Riverside County Sheriff's Office's 3,583 for 2023.
Together, the 13 agencies in Riverside County with all twelve months of 2025 on file reported 25,498 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 Riverside County 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 Riverside County?
Look on the custody page of the Riverside County Sheriff's Office at riversidesheriff.org/213/Inmate-Information. It covers people booked into the county jail.
How many people are in the Riverside County jail?
About 3,760 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 4,975 beds.
Where do people sentenced to prison in Riverside 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 Riverside 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.