Colorado Rabies Vaccination Laws for Dogs and Cats

Colorado does not have a statewide rabies vaccination requirement for pet owners, but that does not make the vaccine optional everywhere in the state.

Colorado rabies vaccine rules at a glance

Question	Answer
Statewide requirement?	Only where a county or district orders it
Who can vaccinate	Vet or under a vet's supervision
Boosters	Not more often than the Compendium
Exemption	Written vet waiver
Statute	C.R.S. 25-4-607

What Colorado law says

C.R.S. 25-4-607 makes vaccination mandatory where a county or district board of health orders it.
Vaccines are given by a veterinarian or under a vet's indirect supervision.
Revaccination frequency may not exceed the national Compendium.
A veterinarian may issue a written medical waiver.

Why you will still need a rabies shot

Cities and counties can require rabies vaccination and usually require it for a dog license.
Boarding kennels, groomers, daycares and training classes almost always ask for a current rabies certificate.
If your pet bites someone, being unvaccinated usually means a longer and stricter quarantine.
Veterinary groups list rabies as a core vaccine for every dog (AAHA).

How rabies boosters work

The first rabies vaccine is treated as good for one year, no matter which product is used. After the one-year booster, vaccines labeled for three years are generally accepted as protecting for three years, if state and local law allow it (Compendium of Animal Rabies Prevention and Control). Your rabies certificate shows the exact due date, and that date is what animal control and licensing offices go by. More detail: how long a rabies shot is good for.

Cats and other pets

Check the table above for whether Colorado law covers cats and ferrets; where state law is silent, local ordinances may still require it. See are cat vaccines required by law.

Rabies vaccination is also tied to licensing in many places; see Colorado dog license requirements. Your local veterinarian or a low-cost vaccine clinic can give the shot and issue the certificate and tag.

Sources

This page summarizes state statutes for general information and is not legal advice. Laws change and cities and counties often add their own rules; check the current statute and your local ordinance, or ask a licensed attorney about your situation.