State
New Hampshire dog laws: leash, licensing, bites and breed rules
New Hampshire licenses every dog 4 months or older through the town clerk and sets statewide fines for nuisance, menace and vicious dog behavior.
Leashes and licensing
| Leash law | A dog off its owner's premises and not under control is a statewide "nuisance" (RSA 466:31) with escalating fines. A stricter at-large ban (RSA 466:30-a) applies only in a city or town that adopts it by vote (RSA 466:30-b). |
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| Licensing | Every dog 4 months or older must be licensed annually with the city or town clerk, runs May 1 to April 30, and wears a tag with the town, year and number (RSA 466:1). Fees are $4.75 or $7.25 plus a $1.75 neutering-fund fee (RSA 466:4). |
Health and bites
| Rabies vaccination | Every dog 3 months or older must be vaccinated, revaccinated at 9 to 12 months, then boosted on the national schedule (RSA 436:100). A biting dog that is not vaccinated, or whose status is unknown, is impounded at least 10 days; a vaccinated one is confined 10 days (RSA 436:105). |
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| Bite liability | Strict liability. A person damaged by a dog may recover from the owner, keeper or possessor unless the person was committing a trespass or other tort; a parent or guardian is liable for a minor owner (RSA 466:19). |
| Dangerous dogs | No dangerous-dog hearing statute. RSA 466:31 treats a dog as a nuisance, menace (growls, snaps, chases) or vicious (bites or attacks). Fines run from a warning to $1,000 and a vicious dog's owner pays the victim's medical bills; the court may order disposition of the dog. |
Other rules
| Breed-specific rules | The statewide nuisance, menace and vicious categories in RSA 466:31 depend on a dog's behavior, not its breed. The statute reviewed sets no breed rule. |
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| Tethering | No statewide tether length or time limit. The cruelty law sets shelter standards for a dog tied or caged outside (RSA 644:8, II-a). |
| Dogs in hot cars | It is cruelty to confine an animal in a motor vehicle where the temperature is so high or so low as to cause serious harm (a misdemeanor). Law enforcement officers and humane agents may rescue the animal and are not liable for reasonable damage (RSA 644:8-aa). |
| Animal cruelty felony | Purposely beating, cruelly whipping, torturing or mutilating an animal is a class B felony; negligent cruelty is a misdemeanor, and a class B felony for a second or later offense (RSA 644:8). |
Main statutes
- RSA 436:100
- RSA 436:105
- RSA 466:1
- RSA 466:19
- RSA 466:30-a
- RSA 466:31
- RSA 466:31-a
- RSA 644:8
- RSA 644:8-aa
This is a general summary of New Hampshire state law for dog owners. It is information, not legal advice. Reviewed November 2026.
Leashes and licensing
New Hampshire sets a statewide behavior rule and lets towns add a stricter one. Under RSA 466:31, a dog that is "at large," meaning off the owner's premises and not under the control of a person present, is a nuisance. Hunting, supervised competition and working livestock dogs accompanied by their owner are excluded. Fines start with a warning, then $50 and $100 within 12 months (RSA 466:31-a). A separate Dog Control Law makes it unlawful for any dog to run at large unless accompanied by its owner, but it applies only in a city or town whose voters adopt it (RSA 466:30-a and 466:30-b).
Every dog 4 months or older must be licensed each year with the clerk of the city or town where it is kept and wear a collar with a metal tag. The licence runs from May 1 to April 30. Fees are $4.75 or $7.25 depending on age and neutering, plus a $1.75 neutering-fund fee (RSA 466:1 and 466:4).
Rabies vaccination
Every dog, cat and ferret 3 months or older must be vaccinated against rabies, within 30 days of reaching 3 months or of arriving in the state. A dog is revaccinated between 9 and 12 months after the first shot and then boosted on the national schedule. A veterinarian-recommended exemption is possible for illness (RSA 436:100).
An apparently healthy dog that is not vaccinated as required, or whose status is unknown, and that bit a person and broke the skin, is impounded under local supervision for at least 10 days and released if a vet finds no sign of rabies. A dog showing likely rabies symptoms that bit someone is euthanized and tested (RSA 436:105).
Dangerous dogs and bites
A person to whom or to whose property damage is caused by a dog the person does not own or keep may recover damages from the owner, keeper or possessor, unless the person was committing a trespass or other tort. A parent or guardian is liable if the owner or keeper is a minor (RSA 466:19).
Separately, RSA 466:31 lists behavior that makes a dog a nuisance (sustained barking, digging on others' property, a female in heat running loose), a menace (growling, snapping at or chasing a person off the owner's premises, or chasing vehicles), or vicious (biting, attacking or preying on game, domestic animals, fowl or people). The civil forfeiture is a warning to $100 for nuisance acts, $200 or $400 for menace acts, and $400 for a first vicious offense and $1,000 for a repeat within 12 months, with the owner liable for the victim's medical bills. A dog that threatens public safety goes straight to court (RSA 466:31 and 466:31-a).
Breed-specific rules
The nuisance, menace and vicious categories in RSA 466:31 turn on behavior, not breed, and the statute sets no breed-specific rule. Check local rules for any breed restrictions.
Tethering and hot cars
New Hampshire has no statewide tether length or hour limit. The cruelty law defines the shelter a dog tied or caged outside needs: shade from direct sun, protection that keeps it clean and dry, and room to stand, turn around and lie down (RSA 644:8).
It is cruelty to confine an animal in a motor vehicle where the temperature is so high or so low as to cause serious harm. A law enforcement officer or humane agent may rescue the animal and is not liable for reasonable damage (RSA 644:8-aa).
Where to check your local rule
Towns and cities often set stricter leash, licence, number-of-dogs and barking rules. Check the town clerk, animal control or the town's ordinances. If a dog has bitten someone or been reported, talk to a lawyer or the animal-control office.
Sources
This is general information about state law, not legal advice. Cities and counties often set stricter rules, and laws change. For a particular situation, ask a lawyer or your local animal control office.
Profile last reviewed November 8, 2026