Contra Costa County, California Not your city or county?

License By Mail

Licensing Ordinance

State law, as well as County ordinance, requires all dogs over 4 months of age to be vaccinated against rabies. All dogs over 3 months of age are required to be licensed by 5 months of age or within 30 days of entering the county.

View the complete Contra Costa County ordinance

If you live within the city limits of Antioch, an Antioch dog license is required instead.

Mailing Address

To license by mail:

  1. Enclose copies of all required paperwork. The license application below may be downloaded and included, but it is not required.
  2. Determine the correct license fee for each of your pets.
  3. Make your check or money order payable to “Contra Costa Animal Services” Please do not send cash.
  4. Mail your paperwork and payment to:

    Contra Costa Animal Licensing
    c/o PetData
    PO Box 141929
    Irving, TX 75014-1929

Required Paperwork

  1. A current rabies vaccination certificate is required if the rabies vaccination on file has expired. Please check your certificate for correct address and pet information.
  2. Separate proof of spay/neuter, such as a signed statement from a veterinarian or a paid invoice for services is required if the pet has been altered since the last licensing period and you are applying for the lower spayed/neutered license fee.
  3. A copy of the owner’s ID card is required to receive the discounted fee for senior citizens age 65 and over.

Your paperwork will not be returned to you, so please retain a copy of your documents for your records.

License Fees

Licensing Fees

1 Year

2 Year

3 Year

Unaltered Pet

$40.00

$74.00

$110.00

Spayed/Neutered Pet

$20.00

$37.00

$55.00

Seniors Age 65 and Over
(limit one discounted license per household)

Senior with Unaltered Pet

$20.00

$37.00

$55.00

Senior with Altered Pet

$10.00

$18.00

$27.00

Other Fees

Late Fee

$40.00

Replacement Tag

$7.00

*Spayed or neutered pets receive a fifty percent discount on licensing fees. This policy is in place to promote sterilization and reduce pet overpopulation.

Due Date

Payment for your license is due within 30 days of the expiration of your current license. If you are licensing for the first time, you must purchase a license within 30 days of obtaining a pet over the age of 3 months or within 30 days of moving into Contra Costa County.

A late fee is added to the license fee if your license is not purchased by the due date. The late fee is $40.

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