New Jersey dog laws: leash, licensing, bites and breed rules

This is a general summary of New Jersey state law for dog owners. It is information, not legal advice. Reviewed November 2026.

Leashes and licensing

New Jersey's dog licensing runs through the municipality. A person who owns, keeps or harbors a dog of licensing age must obtain a licence and a metal registration tag from the municipal clerk each year or every third year, and put the tag on a collar or harness on the dog (N.J.S.A. 4:19-15.2). The town sets the fee by ordinance within a state range of $1.50 to $21 (4:19-15.12).

The statutes cited here do not set a general leash rule. They do require a municipal animal control officer to take into custody a dog off its owner's premises that appears to be a stray, has no current registration tag, or is a female in season (4:19-15.16). Leash rules are generally set by town ordinance.

Rabies vaccination

A municipal clerk may not grant a dog licence unless the owner shows the dog has been inoculated with an approved rabies vaccine, administered by a licensed veterinarian, or has been certified exempt under state health rules. The shots must be repeated at the intervals the state health department sets (N.J.S.A. 4:19-15.2a).

Dangerous dogs and bites

The owner of a dog that bites a person in a public place, or lawfully in a private place including the owner's property, is liable for the damages, whatever the dog's past behavior or the owner's knowledge of it (N.J.S.A. 4:19-16).

The state's dangerous-dog act works through the municipal court. An animal control officer must seize and impound a dog if there is reasonable cause to believe it attacked a person and caused death or serious bodily injury, or caused injury in an unprovoked attack and poses a serious threat (4:19-19). The court declares a dog "vicious" if it finds by clear and convincing evidence that it killed a person or caused serious bodily injury, unless provoked, and may order restrictions or humane euthanasia (4:19-22). A dog is "potentially dangerous" if it caused bodily injury in an unprovoked attack and poses a serious threat, or seriously hurt or killed another domestic animal and poses a serious threat; provocation and crimes on the owner's property are defenses (4:19-23). The owner of a potentially dangerous dog must register it and obey the court's orders, with fines up to $1,000 per day for violations (4:19-28 and 4:19-29).

Breed-specific rules

The state act supersedes any municipal, county or health board law, ordinance or regulation concerning vicious or potentially dangerous dogs, any specific breed of dog, or any other type of dog that is inconsistent with the act (N.J.S.A. 4:19-36). The statutes' definitions depend on conduct, not breed.

Tethering and hot cars

New Jersey's cruel restraint law is detailed. Cruel restraint includes tethering a nursing female or a dog under four months old, in an unoccupied building or on vacant property, without water for more than 30 minutes, in adverse weather for more than 30 minutes, with a choke or prong collar, with a heavy chain or a weight, with one tether holding more than one dog, or with a tether shorter than 15 feet. Tethering outdoors between 11 p.m. and 5 a.m. also counts. A person who stays with and can see the dog is excused from the night, 15-foot and entanglement rules (N.J.S.A. 4:22-17.3).

It is unlawful to leave a living animal unattended in a vehicle under inhumane conditions adverse to its health or welfare (4:22-17(a)).

Where to check your local rule

Municipalities often set stricter leash, licence, number-of-dogs and noise rules. Check the municipal clerk, animal control or the town code. If a dog has bitten someone or been reported, talk to a lawyer or the animal-control office.