Booster seat requirements in Arizona
A car seat or booster until age 8.
Unless the child is taller than 57 inches (4 ft 9 in), which ends the requirement whatever their age.
- Seat belt alone from
- age 8
- First offense
- $50
Every figure on this page was read at Ariz. Rev. Stat. § 28-907 on 4 October 2026. Read the statute
What the Arizona booster seat law says
The stages below are separate rules in the statute, not one rule in steps.
| Rule | Figure | What Arizona requires |
|---|---|---|
| Car seat or booster | under 8 years | Until age 8, unless the child is taller than 57 inches (4 ft 9 in). |
| Adult seat belt alone | from 8 years | Lawful from age 8, or once the child reaches more than 57 inches (4 ft 9 in). |
| Penalty | $50 | $50 for a first offense. Condition A civil penalty of fifty dollars, plus the surcharges Arizona adds to civil penalties, which take the real figure higher. No penalty is imposed if the driver shows the vehicle has since been fitted with a conforming restraint, and a receipt sent to the court officer can be enough. A stop for this alone is not probable cause to search the vehicle. |
Size ends the requirement, whichever comes first. A child who is taller than 57 inches (4 ft 9 in) is out of the booster in Arizona whatever their age. A child who has not reached that stays in one until age 8. The size is an escape from the age rule rather than a second thing that also has to be true.
Where this and size guidance disagree, follow the stricter one. A belt that crosses the neck rather than the middle of the chest is worse protection than a booster even where the statute allows it.
The statute
Arizona sets this in Ariz. Rev. Stat. § 28-907. Read it at the source.
This is information, not legal advice. A city or county in Arizona can set a stricter rule than the state one, and an officer enforces the text of the statute rather than a summary of it. Where this page and the statute differ, the statute is right and this page is a bug.
Where this comes from
- Statute
- Ariz. Rev. Stat. § 28-907
- Source
- www.azleg.gov
- Jurisdiction
- Arizona (AZ), state law only
- Last reviewed
- 4 October 2026 0 days ago
- Read at the statute
- 4 October 2026
- Signed off by a person
- Not yet