Oregon Dog Bite Laws: Liability, Dangerous Dog Rules, and Insurance
What Oregon law expects from you as a dog owner — who pays after a bite, how a dog gets designated dangerous, and whether the state requires liability insurance. Every citation links to the official statute.
This page is not legal advice. It summarizes Oregon state law as of 2026-07-13. Laws change and cities add their own rules — personally check the official statutes linked below, and talk to a licensed Oregon attorney before acting on anything that matters.
| Liability rule | Mixed (statute + common law) |
|---|---|
| Bite statute | ORS 609.115 (limited statutory strict liability); common law (negligence and knowledge-of-vice/"scienter" doctrine) governs bites by dogs with no prior court determination |
| Dangerous-dog statute | ORS 609.098 (dangerous dog); ORS 609.035 (potentially dangerous dog, definitions); ORS 609.990 (penalties, disposition) |
| Insurance requirement | No statewide requirement found |
Who pays when a dog bites — the Oregon rule
Oregon has no single dog-bite statute. Which rule applies depends on your dog's history.
If a court has already ruled your dog a potentially dangerous dog, and it later injures a person or damages property, ORS 609.115 makes you automatically liable for the victim's economic losses (medical bills, lost income, and similar costs, not pain and suffering). That rule applies only after a prior court finding against your specific dog, and not if the victim provoked the dog, was assaulting you, or was trespassing on property you can lawfully exclude people from.
Without that history, ordinary common-law rules apply: a bite victim generally must show you were careless controlling the dog, or, less commonly, that you already knew or had reason to know it had dangerous tendencies. People call this a one-bite rule, but that oversimplifies it. Oregon has no statute spelling this out, and this research found no specific appellate case establishing it, so treat it as general negligence principles, not a cited holding.
Counties can also ban dogs running at large under ORS 609.060, a low-level infraction rather than a crime; whether it also supports a civil negligence claim is unconfirmed.
How a dog gets designated dangerous
Oregon uses two tiers under ORS chapter 609. A dog is potentially dangerous under ORS 609.035(8) if, without provocation and off property you can lawfully exclude people from, it menaces a person (lunges, growls, snarls, or otherwise acts in a way that would make a reasonable person fear for their safety), injures a person short of a serious physical injury, or injures or kills another domestic animal.
Dangerous dog is a heavier, criminal label under ORS 609.098: a dog that, without provocation and aggressively, inflicts a serious injury or kills a person, already carries a potentially dangerous designation and repeats the behavior, or is used as a weapon in a crime. An owner who, through criminal negligence, fails to prevent that behavior commits maintaining a dangerous dog, a Class A misdemeanor rising to a Class C felony if the dog kills someone (ORS 609.990).
Both designations run through a court process. Under ORS 609.093, before ordering a dog killed the court weighs the bite's severity, the owner's history with other dogs, whether the dog can go to a secure facility instead, and its behavior before and since.
Oregon statute sets no fixed list of post-designation requirements, such as confinement specs, a muzzle rule, warning signs, or a registry; courts order reasonable restrictions, including sterilization or euthanasia, case by case. Many cities and counties add their own dangerous-dog ordinances on top, so check with local animal control if this applies to you.
Insurance requirements
Oregon law does not require dog owners to carry liability insurance statewide. A review of ORS chapter 609, covering dog control, dangerous dogs, liability, and penalties, found no requirement to carry insurance or post a bond to keep a dog anywhere in Oregon, even for a court-designated dangerous dog.
This is a statewide finding only: cities or counties may add their own insurance or bond rules through local ordinances, so check your municipal code if your dog has been designated dangerous.
Worth knowing
- Oregon does not stop cities and counties from passing their own breed-specific rules. ORS 609.015 says state dog-control statutes do not limit local power to adopt dog ordinances, so restrictions depend on where you live.
- After a bite, state rule requires a 10-day observation period. Under Oregon Administrative Rule 333-019-0024(2), a dog that bit a person must be held for observation through the 10th day, under a veterinarian or someone the local health administrator designates. This is a rabies-control measure, separate from the liability rules above.
- Maintaining a dangerous dog also carries criminal exposure: a Class A misdemeanor rising to a Class C felony if the dog kills someone (ORS 609.990).
Other states
Rules change at the state line — a dog that is fine at home can put you under a different liability standard on vacation. See the full 50-state table.
General information, not legal advice, current as of 2026-07-13. Statutes get amended and courts reinterpret them — confirm anything that matters with the statute text linked above, your local animal control authority, or a Oregon-licensed attorney. Municipal ordinances can add requirements beyond state law.