Pet Information Line
206-296-7387
206-296-PETS
TTY Relay: 711

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King County pet license application

Instructions for completing and mailing pet license application:

  1. Download the pet license application form (PDF)
  2. Fill out the application
  3. Mail the following materials:
  • completed application
  • proof of pet spay/neuter or affidavit (if applicable)
  • proof of age (if applying for senior citizen license)
  • check made payable to King County Pet License

Mail to:
King County Pet Licenses
500 - 4th Avenue, Room 403
Seattle, WA 98104