Cook County, IL Animal Ordinances: Microchipping (2026)

The County's Animal Control Administrator must hold a microchipping clinic for companion animals of County residents at least once a year, at the animal control facility, animal shelter, or another central County location, with the charge capped at the amount set in Section 32-1 and proceeds credited to the County Animal Control Fund. The Code does not require every pet to be chipped, but a dog judicially declared vicious must be spayed or neutered and microchipped at the owner's expense, and a dog administratively found dangerous must be microchipped within ten days if not already. Removing a tag or microchip to conceal an animal's identity is a separate offense.