The Chicago City Clerk requires all dogs four months and older be registered with the City of Chicago. Registration costs $5 annually for spayed or neutered animals and $50 for dogs that haven't been sterilized. If your dog is currently not registered, please do so as soon as possible in order to avoid a citation.
Per city ordinance, police and other city officials can ask to see the license for a dog on the public way, and if it can't be produced, the official can immediately issue a citation ranging from $30 to $200. The fines will be repeated daily until a dog license is purchased. Call the Chicago City Clerk at 312-744-6770 with questions or to check registration status.