California’s dog bite statute

California is a strict liability state for dog bites, which makes these claims simpler than most injury claims — but only within the statute's boundaries, and those boundaries are narrower than people assume. This is general information, not legal advice.

What the statute says

The owner of any dog is liable for the damages suffered by any person who is bitten by the dog while in a public place or lawfully in a private place, including the property of the owner of the dog, regardless of the former viciousness of the dog or the owner's knowledge of such viciousness.

Read the clauses separately, because each one is doing work:

• "The owner." The claim runs against the owner. Someone walking or minding the dog is not automatically covered by it, though they may be liable in ordinary negligence.
• "Is bitten." Bites only. This is the statute's sharpest limit.
• "In a public place or lawfully in a private place." Lawful presence is the element a defence will attack.
• "Including the property of the owner." Being on the owner's own land does not defeat the claim if you were there lawfully.
• "Regardless of the former viciousness … or the owner's knowledge." No prior history is needed, and the owner's ignorance is not a defence. This is what makes it strict liability.

Sources: Civ. Code, § 3342(a) (dog bite liability). Last amended Stats. 1988, ch. 298 — which added the governmental military and police dog exceptions in subds. (b)–(d). Not amended in the last three years. CACI No. 463 (dog bite statute — essential factual elements), Judicial Council of California Civil Jury Instructions (2026 edition).

What you have to prove

The jury instruction reduces it to four elements: that the defendant owned a dog; that the dog bit you while you were in a public place or lawfully on private property; that you were harmed; and that the dog was a substantial factor in causing the harm.

There is no element about the owner's care, the dog's history, or whether anything could have been done differently. That is the point of a strict liability statute, and it is why these claims turn on facts rather than on fault.

Lawful presence, which is where the fight is

The instruction supplies the working definition: a person is lawfully on the private property of the owner if they were performing any duty required by law, or were on the property at the invitation, express or implied, of the owner.

That reaches postal carriers, delivery drivers, meter readers, and utility workers doing their jobs — see delivery and postal workers — and it reaches guests, invited or impliedly welcome. An implied invitation covers a good deal: walking up an unobstructed path to a front door is ordinarily implied permission.

Bites only, and what happens otherwise

The statute does not reach a dog that jumps up and knocks someone down, that causes a cyclist to swerve, or that injures without biting. Those are real injuries and they have a route — just not this one.

The common-law route asks whether the owner knew or should have known the animal had an unusually dangerous nature or tendency. The elements are: that the defendant owned, kept, or controlled the animal; that it had an unusually dangerous nature or tendency; that before the injury the defendant knew or should have known of it; that the plaintiff was harmed; and that the tendency was a substantial factor in causing the harm.

That is a real burden and it is why the statute matters so much for bites. A third route also remains: ordinary negligence in how the dog was controlled — an unsecured gate, a dropped lead, a dog left where it could reach a walkway.

Sources: CACI No. 462 (strict liability for injury caused by a domestic animal with dangerous propensities — essential factual elements), Judicial Council of California Civil Jury Instructions (2026 edition).

The exceptions, and the defences

The statute itself carves out governmental military and police dogs in defined circumstances. Beyond that, the recurring defences are:

• Trespass. The direct attack on lawful presence, and the one most often raised.
• Provocation. Not in the statute's text, but argued as comparative fault. It is weak against a young child — see children and facial injuries.
• Assumption of risk, in the specific setting of someone who takes charge of a dog professionally. The Judicial Council's own authority for CACI 463 notes that assumption of the risk and contributory negligence defences may still be available, which is worth knowing before assuming strict liability ends the argument.

Common questions

Does California have a "one bite" rule?

Not for bites. Civil Code section 3342 makes an owner liable for damages suffered by a person bitten in a public place or while lawfully in a private place, regardless of the former viciousness of the dog or the owner’s knowledge of it. The dog does not get a free first bite.

What if the dog knocked me over rather than biting me?

Then the statute does not apply, because it is limited to bites. A non-bite injury runs on the common-law route instead, where you show the owner knew or should have known the animal had a dangerous propensity, or on ordinary negligence in how the dog was controlled.

I was on their property. Does that defeat the claim?

Only if you were there unlawfully. The statute covers a bite in a public place or while lawfully in a private place, including the owner’s own property. Being there to perform a duty required by law, or at the owner’s express or implied invitation, counts as lawful.

Does the skin have to be broken?

Not according to the authority the Judicial Council cites with the dog bite instruction. A bite can apply without the skin being broken, which matters for crush injuries from a dog’s jaws.