A common question from visitors renting a car in the US with children: does the car seat law apply to us, given that we’re not residents and the car is a rental? The short answer, based on how these statutes are actually written, is that nothing in the data suggests otherwise — but it’s worth understanding exactly what the statutes do and don’t say, rather than assuming either way.
What “out-of-state” means in these statutes
Each state’s child-restraint statute is written around a general subject — usually “a person,” “the driver,” or “the operator” of a vehicle in that state — rather than around residency. Most of these statutes don’t mention residency, citizenship, or where the vehicle is registered at all. Among the 51 jurisdictions we cover, 49 are silent on the question of out-of-state or nonresident drivers and vehicles specifically: the statute simply doesn’t address it as a separate case.
That silence is not the same as an exemption. None of the 51 jurisdictions we cover exempts out-of-state vehicles or nonresident drivers from its child-restraint requirement. A statute that doesn’t mention foreign visitors or rental cars is a statute that also doesn’t carve out an exception for them — it applies to the situation the same way it applies to everything else the general “a person” or “the operator” language covers.
The two states that do address it
Only two states explicitly extend their requirement to out-of-state vehicles in the statute text itself, and both do it the same direction — toward requiring, not exempting:
Maryland: the statute specifically covers vehicles registered in another state, or in Puerto Rico, of the same types the law otherwise applies to.
New York: the statute defines “motor vehicle” to include vehicles that would be required to have safety belts if they were registered in New York — meaning a vehicle registered elsewhere doesn’t escape the requirement just because it wasn’t titled in-state.
Neither of these is a special rule aimed at visitors specifically. They’re both clarifications that the state’s ordinary requirement isn’t limited to vehicles bearing that state’s own plates.
What this means if you’re renting a car
Rental car companies operating in the US are generally aware that every state requires some form of child restraint and typically offer seats for rent, though the availability, type, and condition of a rental company’s seats is a question for the rental agency, not something covered in the state statutes this site tracks. What the statutes do establish is which restraint stage — rear-facing, forward-facing harness, booster, or seat belt alone — applies to a child of a given age, weight, or height in the state you’ll actually be driving in.
Because US car seat law is set state by state rather than nationally, and because a road trip can cross several states in a single day, the practical approach is the same one that applies to any domestic traveler: use the seat stage required by the strictest of the states you’ll pass through, since a seat that satisfies a stricter state’s requirement will also satisfy a more lenient one. Check the specific ages, weights, and heights on the Car seat stages section of each state you’ll be driving in — the numbers vary by state in ways that don’t track any single national standard, and there’s no federal minimum age or weight that substitutes for reading the state’s own requirement.
What isn’t addressed here
This site tracks car seat law only — the restraint requirement itself, its exemptions, and its penalties. It does not cover general driving eligibility questions such as whether a foreign driver’s license or an International Driving Permit is valid in a given state, which is a separate question from what seat a child must use once you’re driving. For that, check with the rental agency or the state’s motor vehicle agency directly.