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 25, 2026.
Seaside, California, in Monterey County, has about 32,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Seaside is held at the county jail, run by the Monterey 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: Seaside public records, Monterey County inmate search, Seaside arrest records, Seaside warrants, Seaside criminal records, Seaside court records, California arrest records and California inmate search.
Finding Someone in Custody in Seaside
A person kept in custody after an arrest in Seaside is held at the county jail, run by the Monterey County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Monterey County Sheriff's Office at countyofmonterey.gov/Home/Components/ServiceDirectory/ServiceDirect... (page title: County Jail Booking Information | County Services | County of Monterey, CA), phone (831) 755-3782, 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 Monterey County Jail by the Numbers
On an average day in 2025 the jail held about 820 people, down from about 860 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,224 beds, and it ran at 74 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Monterey County has about 436,000 residents (2024 Census Bureau estimate), so the jail holds about 19 people for every 10,000 residents.
Who Books People Into the Monterey County Jail
The Monterey County Sheriff's Office and the agency that reports for Seaside (filed by the FBI as Seaside Police Department) make the arrests that end in a booking in and around Seaside.
The FBI's agency list also places one other agency, two state agencies and one campus police department in Monterey County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Salinas's 2,171 for 2025, the Monterey County Sheriff's Office's 812 for 2025 and Monterey's 760 for 2025.
Together, the 13 agencies in Monterey County with all twelve months of 2025 on file reported 6,756 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 Seaside 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 Seaside?
Look on the custody page of the Monterey County Sheriff's Office at countyofmonterey.gov, or call (831) 755-3782. It covers people booked into the county jail.
How many people are in the Monterey County jail?
About 820 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 1,224 beds.
What is the phone number for the Monterey County jail?
(831) 755-3782, the number on the page of the Monterey County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Monterey 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 Seaside 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.