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  1. Welcome to the Tax Portal


    We've collated all the information you need regarding Contra Costa taxes. Peruse rates information, view relief programs, make a payment, or contact one of our offices.
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  1. Tax Calendar

August 2022

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  1. Tue, Aug 16

    Treasury Oversight Committee The Board of Supervisors established the Treasury ...
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  2. Mon, Sep 5

    Closed for Labor Day
    Read More

  3. Tue, Nov 1

    1st Installment Secured Property Taxes Due
    Read More
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  1. Tax News
  1. FAQ3

    Frequently Asked Questions

    Have a question about property taxes in Contra Costa County? You are not alone. Hopefully, we have the answer you are looking for. Read more...
  2. Senior Group

    Tax Assistance for Seniors

    Depending on age and sometimes income, Seniors may qualify for certain tax assistance. Read more...
  3. Important Dates5

    Important Tax Dates

    The following schedule is intended to serve as a general guide to property owners in Contra Costa County, California. Read more...
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  1. Contact Us:   Public Information Contacts  Contact Webmaster

    Government Center:       1025 Escobar Street, Martinez, CA 94553
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