Illinois Rabies Vaccination Laws for Dogs and Cats

Updated October 13, 2026 · 1 min read · 4 sources

Short answer

Illinois requires dogs and cats 4 months or older to be vaccinated against rabies by a licensed veterinarian (510 ILCS 5/8). A second shot is required within one year of the first, and later boosters follow the vaccine's USDA license. A vet can grant a written medical exemption, reviewed at least yearly.

Illinois requires rabies vaccination by state law. Here is who must be vaccinated, when, and how the rules are enforced.

Illinois rabies vaccine rules at a glance

Question Answer
Animals covered Dogs and cats
First vaccination 4 months
Second dose Within 1 year of the first
Later boosters Per the vaccine's USDA license
Statute 510 ILCS 5/8

What Illinois law says

  • 510 ILCS 5/8 requires vaccination of dogs and companion cats 4 months and older.
  • A second vaccination within one year is mandatory; later intervals follow the product label.
  • Exempt animals must be re-examined at least yearly; exempt animals that bite are treated as unvaccinated.
  • Feral cats are generally exempt, except when presented for sterilization.

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

Illinois covers companion cats on the same schedule as dogs.

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

Sources

  1. Michigan State University Animal Legal & Historical Center: Illinois dog laws
  2. Michigan State University Animal Legal & Historical Center: Table of state rabies vaccination laws
  3. dvm360: New rabies recommendations for dogs and cats (Compendium of Animal Rabies Prevention and Control)
  4. AAHA: 2022 Canine Vaccination Guidelines, core and noncore vaccines

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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.

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