Police and sheriff · California

Law Enforcement Agencies in Contra Costa County, California

25 agenciesFBI UCR list

The FBI's Uniform Crime Reporting program lists 25 law enforcement agencies in Contra Costa County, California: the county sheriff's office, 20 city or town police departments, 1 state police post, 1 campus police department and 2 other agencies.

Sheriff's Office and County Police in Contra Costa County

  • Contra Costa County Sheriff's OfficeCounty sheriff or police · ORI CA0070000 · NIBRS since 2022

City and Town Police Departments in Contra Costa County

  • Antioch Police DepartmentCity or town police · ORI CA0070100 · NIBRS since 2021
  • Brentwood Police DepartmentCity or town police · ORI CA0070200 · NIBRS since 2023
  • Clayton Police DepartmentCity or town police · ORI CA0070300 · NIBRS since 2021
  • Concord Police DepartmentCity or town police · ORI CA0070400 · NIBRS since 2021
  • Danville Police DepartmentCity or town police · ORI CA007230X · NIBRS since 2022
  • El Cerrito Police DepartmentCity or town police · ORI CA0070500 · NIBRS since 2021
  • Hercules Police DepartmentCity or town police · ORI CA0070600 · NIBRS since 2022
  • Kensington Police DepartmentCity or town police · ORI CA0071300 · NIBRS since 2021
  • Lafayette Police DepartmentCity or town police · ORI CA0071500 · NIBRS since 2022
  • Martinez Police DepartmentCity or town police · ORI CA0071400 · NIBRS since 2022
  • Moraga Police DepartmentCity or town police · ORI CA0071600 · NIBRS since 2021
  • Oakley Police DepartmentCity or town police · ORI CA007340X · NIBRS since 2022
  • Orinda Police DepartmentCity or town police · ORI CA007260X · NIBRS since 2022
  • Pinole Police DepartmentCity or town police · ORI CA0070700 · NIBRS since 2022
  • Pittsburg Police DepartmentCity or town police · ORI CA0070800 · NIBRS since 2022
  • Pleasant Hill Police DepartmentCity or town police · ORI CA0070900 · NIBRS since 2022
  • Richmond Police DepartmentCity or town police · ORI CA0071000 · NIBRS since 2021
  • San Pablo Police DepartmentCity or town police · ORI CA0071100 · NIBRS since 2022
  • San Ramon Police DepartmentCity or town police · ORI CA0074000 · NIBRS since 2022
  • Walnut Creek Police DepartmentCity or town police · ORI CA0071200 · NIBRS since 2022

State Police in Contra Costa County

  • Highway Patrol: Contra Costa Area OfficeState police · ORI CA0079920 · NIBRS since 2021

College and University Police in Contra Costa County

  • Contra Costa Community CollegeCollege or university police · ORI CA0072100

Other Law Enforcement Agencies in Contra Costa County

  • San Francisco Bay Area Rapid Transit: Contra Costa CountyOther agency · ORI CA0071800 · NIBRS since 2024
  • Union Pacific Railroad: Contra Costa CountyOther agency · ORI CA0073300 · NIBRS since 2025

Where People Arrested in Contra Costa County Are Held

In most U.S. counties, adults arrested by city police, the sheriff or state troopers are booked into the county jail first. Some larger cities run their own holding jail, so if a person is not on the county roster, call the arresting department.

Law Enforcement in Other California Counties

Agency names, types and ORI codes come from the FBI Crime Data Explorer agency list, retrieved November 2026. NIBRS dates show when an agency began reporting incident-level crime data to the FBI.

Frequently Asked Questions

How many police departments are in Contra Costa County?
The FBI lists 25 law enforcement agencies in Contra Costa County, including 20 city or town police departments. The full list is on this page.
Who runs the jail in Contra Costa County?
In most counties the sheriff runs the county jail. In Contra Costa County that is the Contra Costa County Sheriff's Office. See Richmond Police Department — Recent Arrests (Contra Costa County) on this site for the jail's roster or contact details.
What is an ORI number?
An ORI is the nine-character identifier the FBI assigns to each law enforcement agency for crime reporting, for example CA0070000. It is useful when you request records or read crime statistics.