- Free Case Evaluation: 312-779-6171 Tap Here To Call Us
Illinois Leash Law: Who Is Liable When an Unleashed Dog Bites?
When an unleashed dog bites, the dog’s owner may be liable under Illinois law if the dog attacked, attempted to attack, or injured a person who was acting peaceably and lawfully present, and the attack was without provocation. Local leash ordinances can also provide additional evidence about whether the dog was properly restrained.
Illinois Law Holds the Responsible Party Accountable for Dog Bites
An unleashed dog poses a serious threat to public safety. When a dog suddenly bites someone, it can cause painful injuries and lasting trauma for the injured person.
We recognize the disruption these incidents cause and are committed to holding the responsible party accountable.
Under 510 ILCS 5/16 of the Illinois Animal Control Act, if a dog bites or attacks a person without provocation, the dog’s owner can be held strictly liable for the resulting harm. The statute applies when the person is peaceably conducting themselves in a place where they may lawfully be, and it covers an attack, an attempted attack, or an injury.
This protection applies when the injured person was lawfully present, whether on public property or private property where they had permission to be. If someone was trespassing at the time of the incident, however, their right to recover damages may be limited.
Under the Illinois Animal Control Act, the statutory definition of “owner” is broader than legal title alone. It includes a person who keeps or harbors the animal, has it in their care, acts as its custodian, or knowingly permits the dog to remain on property they occupy.
Victims must also act quickly. Under 735 ILCS 5/13-202 (Illinois Statute of Limitations for Personal Injury), you generally have two years from the date of the incident to pursue compensation for your losses.
Does Illinois Have a Statewide Leash Law?
Illinois law addresses dogs that are “running at large,” but local governments may impose additional animal-control and leash requirements. Section 9 of the Illinois Animal Control Act allows authorities to apprehend and impound a dog running at large, and the owner is subject to a $25 public safety fine. A second or subsequent violation also triggers a sterilization requirement unless the dog is already sterilized.
The Act defines a “leash” as a cord, rope, strap, or chain securely fastened to a dog’s collar or harness and strong enough to keep the animal under control. The statute also provides exceptions for certain legal hunting activities and supervised dogs in dog-friendly areas or dog parks.
Because municipal rules can impose additional restrictions, the applicable ordinance may depend on where the dog was being walked or allowed to roam. This means a leash law an Illinois resident encounters in one municipality may differ from the requirements in another.
Chicago’s Leash Law and Restraint Requirements
Chicago’s Municipal Code requires owners to keep animals under restraint. Section 7-12-030 generally requires an animal to be leashed and under the control of the owner or another responsible person when outside the owner’s property, subject to the ordinance’s specific provisions and exceptions.
The Chicago ordinance also states that allowing an animal to attack, bite, threaten, or jump on a person without consent outside the owner’s property constitutes a failure to restrain the animal. A violation can carry a $300 fine when it does not result in severe injury or death, while violations resulting in severe injury or death can carry fines from $1,000 to $10,000.
These local requirements can be relevant when evaluating an off-leash dog attack in Chicago. However, a violation of a municipal restraint ordinance does not replace the requirements of the Illinois Animal Control Act for a civil dog bite claim.
Suburban and County Leash Ordinances
Leash and animal-control requirements can vary among Illinois municipalities and counties. If a dog bite occurred outside Chicago, the applicable local ordinance should be reviewed along with state law. The location of the incident can therefore matter when determining whether the dog was unlawfully running at large or otherwise not properly restrained.
Identifying the Liable Party: The “Owner” vs. The “Keeper”
Determining who is responsible when an unleashed dog bites or injures a person starts with identifying who had custody and control of the animal at the time of the attack. Under Illinois law, liability can fall on either the dog’s legal owner or a temporary caretaker, often referred to as a “keeper.”
The Dog Owner: If an owner fails to secure their pet, such as leaving a gate open or allowing the dog to roam from their private property, they can be held responsible if the dog bites a person. Under 510 ILCS 5/2.16, the statutory definition of “owner” includes people who keep, harbor, care for, or act as custodians of the animal.
The Keeper: If a dog sitter, dog walker, or friend was caring for the dog and chose to let it off its leash in public, that person may be treated as the legal “keeper” and held accountable if the dog bites someone. Whether that person’s role falls within the statutory definition of “owner” depends on the circumstances and the person’s relationship to the dog.
How a Leash Law Violation Affects Your Dog Bite Claim
A violation of a local restraint ordinance can provide evidence that a dog was not properly controlled, but Illinois dog bite liability does not depend solely on proving a leash violation. Under 510 ILCS 5/16, the key statutory requirements include an attack, attempted attack, or injury, lack of provocation, and the injured person’s lawful presence.
Evidence that a dog was unlawfully running at large may nevertheless be important when investigating an unleashed dog bite liability claim. Useful evidence can include photographs of the location, the dog’s leash or enclosure, witness statements, surveillance footage, animal-control records, and the applicable local ordinance.
We recommend attorney review before characterizing a particular leash violation as negligence per se or making a definitive statement about how comparative fault or provocation applies to a specific Animal Control Act claim.
Leash and Muzzle Rules for Dangerous Dogs
Illinois law imposes additional control requirements for dogs designated as dangerous. Under 510 ILCS 5/15.2, a person may not knowingly or recklessly permit a dangerous dog to leave its owner’s premises without control by a leash or another recognized control method. Chicago also has separate requirements for dangerous animals, including a muzzle and a leash or chain no longer than six feet when the animal is off the owner’s property.
For more information, see our vicious dog rules in Illinois.
What to Do After an Off-Leash Dog Attack
If you are injured by an off-leash dog, taking a few immediate steps can help preserve evidence for a potential claim:
- Seek medical attention for any bite, puncture, fall-related injury, or other physical injury.
- Report the incident to the appropriate animal-control agency or police department.
- If possible, identify the dog’s owner, keeper, or person responsible for the animal.
- Photograph your injuries, the location, the dog, and any relevant leash, gate, fence, or property conditions.
- Collect contact information from witnesses and preserve available surveillance footage.
If you can’t identify the owner, you may need to take additional steps to document the incident and determine whether an insurance claim or other source of compensation applies. See our Chicago unleashed dog attack lawyer page for more information.
Illinois Dog Bite Laws and Potential Compensation
Dog bite claims can involve medical expenses, lost income, and other losses caused by the injury. We should review the applicable Illinois dog bite laws and the facts surrounding the incident before determining what compensation may be available.
Frequently Asked Questions
Generally, dogs must be controlled under applicable state and local animal-control requirements. Illinois law addresses dogs running at large, while municipalities may impose additional leash or restraint rules. The specific location matters, so review the local ordinance along with the Illinois Animal Control Act.
It can be, depending on the applicable municipal or county ordinance and the circumstances. Illinois law permits enforcement against dogs running at large in situations covered by the Animal Control Act, and local governments can impose additional restraint requirements. A dog being on private property does not automatically resolve whether the animal was properly restrained.
For ordinary dogs, Chicago’s general restraint provision does not state a six-foot maximum leash length. However, Chicago’s dangerous-animal requirements specify a substantial chain or leash no longer than six feet when a dangerous animal is off the owner’s property. The applicable rule therefore depends on the animal’s legal designation and circumstances.
Start by documenting the dates, locations, and circumstances of the off-leash incidents. If the dog poses a safety concern or has attacked someone, contact the appropriate local animal-control agency or police department. If an injury occurred, preserve medical records, photographs, witness information, and other evidence that may support a dog bite claim.
Schedule a Free Consultation with Our Dog Bite Attorneys
If you or a loved one has suffered injuries because an unleashed dog bites someone, you should not have to face the aftermath alone. Our firm has extensive experience holding individuals, including dog owners and temporary caretakers, accountable under Illinois state law.
Contact us to schedule a free consultation and discuss your dog bite injury with our legal team.
A Chicago dog attack lawyer will thoroughly investigate your case, identify the correct owner or “keeper,” and pursue the full compensation you deserve. Remember, you have only two years from the date of the bite to file a claim.
Contact us today to schedule a free consultation. We are ready to fight for your rights and help you seek compensation for your medical costs, lost wages, and pain.
Legally Reviewed By
Attorney Jonathan Rosenfeld
Content legally reviewed by Jonathan Rosenfeld The information on this page has been legally reviewed by Attorney Jonathan Rosenfeld, founder and managing partner of Rosenfeld Injury Lawyers LLC. With extensive experience representing dog bite victims across Chicago, Mr. Rosenfeld is dedicated to helping injury victims hold negligent dog owners accountable and pursue the maximum compensation available under the law. His deep legal knowledge and commitment to client advocacy ensure that the information provided is accurate, reliable, and aligned with current legal standards.