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McHenry County, IL Animal Ordinances: Breed Restrictions (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Breed ban
None (breed-neutral by statute)
Vicious-dog law
510 ILCS 5/15
Confinement
Enclosure required
When out
Muzzle + 300-lb chain
County definition
§ 8.04.860

Summary

Neither McHenry County nor Illinois bans dogs by breed. Under 510 ILCS 5/15, a dog is regulated by its individual conduct: vicious dogs must be confined to an enclosure and, when out, muzzled and restrained by a 300-pound chain. The statute forbids breed-specific classification.

These county ordinances apply to unincorporated areas of McHenry County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

It is unlawful for any person to keep or maintain any dog which has been found to be a vicious dog unless such dog is at all times kept in an enclosure. ... Vicious dogs shall not be classified in a manner that is specific as to breed.

View official code

Full Breakdown

Illinois' Animal Control Act (510 ILCS 5/15) defines a "vicious dog" as a dog that, unprovoked, bites or attacks a person or animal, or has a known propensity to attack. A vicious dog must at all times be kept in an enclosure; it may leave only for veterinary care or court order while securely muzzled and restrained by a chain of at least 300-pound tensile strength no longer than three feet. Critically, the Act states vicious dogs shall not be classified by breed. McHenry County's ordinance (§ 8.04.860) defines a vicious dog as one that without justification attacks a person causing serious injury or death, or is found a "dangerous dog" three separate times.

Violations & Fines

Keeping a declared vicious dog outside an approved enclosure leads to impoundment and possible court-ordered euthanasia; owners face fines and mandatory spay/neuter and microchipping.

Frequently Asked Questions

Are pit bulls or other breeds banned in McHenry County?
No. Illinois law (510 ILCS 5/15) prohibits classifying vicious dogs by breed, so no breed is banned. Dogs are regulated by their individual behavior, not their breed.
What happens if my dog is declared vicious?
It must be kept in an approved enclosure at all times, muzzled and restrained by a 300-pound chain when out, spayed/neutered and microchipped; a court may order euthanasia.

Sources & Official References

Other rules in McHenry County

Dog Leash LawsSome RestrictionsChickens & LivestockSome RestrictionsFire Regulations: Fire Pits & Backyard FiresLight RestrictionsMicrochippingSome RestrictionsCat RulesSome RestrictionsVeterinary Clinic ZoningSignificant RestrictionsMandatory Spay/NeuterSome RestrictionsExotic PetsSome RestrictionsBeekeepingSome RestrictionsPet LimitsSome RestrictionsParking Rules: Loading ZonesSome RestrictionsFire Regulations: Outdoor BurningSignificant RestrictionsLandscaping Rules: Rainwater HarvestingFew RestrictionsSign Regulations: Digital BillboardsSome RestrictionsShort-Term Rentals: Short-Term Rental Parking RulesSome Restrictions

All McHenry County rules

How McHenry County compares: Cities with No Dog Breed Restrictions·Compare McHenry County to another location·View the Illinois animal ordinances overview

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