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The Denver Revised Municipal Code requires all dogs and cats 6 months of age and older to be vaccinated against rabies. All dogs and cats are required to be licensed within 30 days of being in the City.
Pit bull breeds or any dog mixed with the pit bull breeds are illegal in Denver County and cannot be licensed.
View the complete Denver Revised Municipal Code:
Payment for your license is due upon expiration of your pet's current license. If you are licensing for the first time, you must purchase a license within 5 days of vaccination against rabies, or within 30 days of acquiring the pet or moving into the City of Denver.
Licenses may be purchased for 1 or 3 years, with fees charged accordingly. The lifetime license is good for the life of the pet while it is in the care of the original owner.
Lifetime, senior and service licenses require free renewals to confirm owner information and update rabies vaccination information.