Booster seat requirements in Wyoming
A car seat or booster until age 9.
Wyoming sets no height or weight that ends the requirement early. Age is the only test.
- Back seat until
- age 9
- Seat belt alone from
- age 9
Every figure on this page was read at Wyo. Stat. § 31-5-1303 on 4 October 2026. Read the statute
What the Wyoming booster seat law says
The stages below are separate rules in the statute, not one rule in steps. The back seat requirement and the restraint requirement are different obligations, and a child can be caught by both at once.
| Rule | Figure | What Wyoming requires |
|---|---|---|
| Car seat or booster | under 9 years | Until age 9. |
| Back seat | under 9 years | Required for a child under age 9. |
| Adult seat belt alone | from 9 years | Lawful from age 9. |
| Penalty | no figure | No amount recorded. Condition A citation and a fine of not more than $50 for a first offense, which the court must waive on proof that the driver bought, leased or otherwise acquired a conforming child safety restraint system after the offense. Not more than $100 for a second or later violation. Using a seat contrary to the manufacturer's instructions is itself a violation carrying the same fine (Wyo. Stat. § 31-5-1304). |
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
Wyoming sets this in Wyo. Stat. § 31-5-1303. Read it at the source.
This is information, not legal advice. A city or county in Wyoming 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
- Wyo. Stat. § 31-5-1303
- Source
- www.wyoleg.gov
- Jurisdiction
- Wyoming (WY), 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