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  1. County Elections Banner Graphic

    Primary Election Official Results

    The official final results for the June 2, 2026, Statewide Direct Primary Election are now available.

  2. Community Warning System

    Register for CWS Alerts

    The Community Warning System (CWS) is Contra Costa County’s all-hazard public warning notification system. CWS alerts you when a potential life- or health-threatening hazard requires immediate action.

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County information

  1. News & Updates

    We want to ensure you have all the news & announcements

  1. Con Fire logo

    Illegal Fireworks Use Dangers & Preventing Wildfires

    Posted on June 22, 2025

    Fire officials urge prevention and caution during a high wildfire danger season in Contra Costa Coun... Read more...
  2. I voted

    Primary Election Official Final Results

    Posted on June 1, 2025

    Official final results for the June 2, 2026, Statewide Direct Primary Election are now available. Read more...
  3. Supervisor Ken Carlson puts up the Pride Flag in front of the Administration Building

    LGBTQIA+ Resources in Contra Costa County

    Posted on June 22, 2026

    Here are resources to help the LGBTQIA+ community with peer support, mentoring, and social activitie... Read more...
  4. Government Speak Podcast Logo

    Government Speak: A Contra Costa County Podcast

    Posted on June 24, 2026

    Contra Costa County’s Office of Communications & Media is excited to share the latest episode of... Read more...
  5. Emergency Alerts Survey Social Graphic English CWS Colors

    Help Improve Emergency Alerts in Contra Costa County

    Posted on June 15, 2026

    Contra Costa County wants your feedback on emergency alerts, warnings systems, and preparedness. Read more...
  6. Boating Safety

    Safety Tips for Boating Season

    Posted on May 22, 2026

    The Memorial Day holiday weekend traditionally marks the start of boating season on the Delta. A lar... Read more...
  7. Survey Graphic

    Help Shape the Future of Health in Contra Costa County

    Posted on June 17, 2026

    Contra Costa County residents are invited to participate in the County's Community Health Assessment... Additional Info...
  8. Contra Costa Resilient Shoreline Flyer

    Join a Resilient Shoreline Community Advisory Cohort!

    Posted on June 17, 2026

    Contra Costa County is developing a Resilient Shoreline Plan that will address rising sea levels and... Read more...
  9. Energy Efficiency Lightbulb

    Save Water and Energy with a Green House Call

    Posted on May 4, 2026

    Contra Costa County residents can get help lowering their utility bills by participating in the free... Read more about Green House Call Program
  10. Roxy full costume

    Meet Roxy the Fox

    Posted on June 9, 2026

    A new storyteller is on the move in Contra Costa County. Meet Roxy the Fox, mascot of the Contra Cos... Read more...
  11. Groceries

    New CalFresh Requirements Start June 1, 2026

    Posted on June 1, 2026

    More CalFresh participants will need to work or participate in a community engagement activity to ke... Read more...
  12. Contra Costa County Seal

    County Fish and Wildlife Committee Accepting Grant Applications

    Posted on June 2, 2026

    The Contra Costa County Fish and Wildlife Committee is now accepting applications from individuals a... Read more...
  13. Invasive Glassy-Winged Sharpshooter Found on Plants Sold in Contra Costa County

    Consumer Alert: Invasive Glassy-Winged Sharpshooter Found on Plants Sold at Multiple County Location

    Posted on May 27, 2026

    Invasive glassy-winged sharpshooter found on grapevines sold at 5 Contra Costa County locations. The... Read more...
  14. Fiscal Year Budget Book 2026-2027

    Fiscal Year 2026-2027 Adopted Budget

    Posted on April 28, 2026

    On Tuesday, May 19, the Contra Costa County Board of Supervisors adopted the $7.248 billion Fiscal Y... Read more...
  15. Fire Chief

    Board of Supervisors Appoints Aaron McAlister to Lead Con Fire

    Posted on May 12, 2026

    On Tuesday, the Contra Costa County Board of Supervisors appointed Aaron McAlister as Fire Chief of ... Read more...
  16. CCSealColor_1 png file

    Contra Costa County Responds to Recent Executive Orders

    Posted on January 24, 2025

    Amid recent changes and concerns about federal immigration policies, Contra Costa County wants to re... Read more...
  17. Ready Contra Costa

    Ready Contra Costa/ Listos Contra Costa

    Posted on September 5, 2023

    Preparing before, during, and after extreme weather conditions is essential. Make a family communica... Read more...
  18. Spring 2026 Contra Costa FOCUS Cover

    Contra Costa FOCUS Newsletter

    Posted on April 30, 2026

    The Spring 2026 edition of the Contra Costa FOCUS Newsletter is here! This issue’s Spotlight stor... Read more...
  19. Measure X Innovation Fund logo

    Contra Costa County Innovation Fund

    Posted on April 15, 2025

    Thank you, Contra Costa County, for fueling positive change through the Innovation Fund and your con... Read more...
  20. East County Service Center Groundbreaking Supervisors

    East County Service Center in Brentwood

    Posted on April 17, 2026

    Contra Costa County celebrated the groundbreaking of the East County Service Center (ECSC), a major ... Read more...
  21. Contra Costa County Seal 2

    Most Recent Federal and State Updates

    Posted on January 2, 2026

    Contra Costa County is closely monitoring the impacts of the 2025 federal and state policy changes, ... Read more...
  22. Inside Public Works

    Watch “Inside Public Works”

    Posted on January 3, 2025

    Watch “Inside Public Works”, a program that offers viewers an opportunity to learn about how our Pu... Read more...
  23. Community Impact Fund Survey

    Community Impact Fund

    Posted on October 16, 2025

    Thank you for sharing your voice through our Community Impact Fund Survey. Your feedback has been in... Read more...
  24. CCSealColor_1 png file

    Contra Costa County Stands with Our Immigrant Communities

    Posted on June 12, 2025

    Contra Costa County stands with our immigrant communities. We know recent federal immigration action... Read more...
View All News
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Contra Costa

  1. Event Calendar

    Mark your calendar, we have an event for everyone

View all calendar events

  1. Jul 6
  2. Zoning Administrator Meeting

    Zoning Administrator MeetingRead On
  1. Jul 8
  2. County Planning Commission Meeting

    County Planning Commission MeetingRead On
  1. Jul 20
  2. Zoning Administrator Meeting

    Zoning Administrator MeetingRead On
  1. Jul 22
  2. County Planning Commission Meeting

    County Planning Commission MeetingRead On
  1. Aug 3
  2. Zoning Administrator Meeting

    Zoning Administrator MeetingRead On
/Calendar.aspx

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  1. Contra Costa County CA Homepage

  1. County Contacts

    Contact Us: Public Information Contacts - Media Inquiries - Contact Webmaster
     
    County Administration Building:   
    1025 Escobar Street, Martinez, CA 94553
    1st Floor:  Clerk of the Board 
    2nd Floor:  Human Resources 
    3rd Floor:  County Counsel 
    4th Floor:  County Administration

    For all other County departments and offices, see their web pages.

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