Booster seat requirements in Idaho
A car seat or booster until age 7.
Idaho sets no height or weight that ends the requirement early. Age is the only test.
- Seat belt alone from
- age 7
Every figure on this page was read at Idaho Code § 49-672 on 4 October 2026. Read the statute
What the Idaho booster seat law says
The stages below are separate rules in the statute, not one rule in steps.
| Rule | Figure | What Idaho requires |
|---|---|---|
| Car seat or booster | under 7 years | Until age 7. |
| Adult seat belt alone | from 7 years | Lawful from age 7. |
| Penalty | no figure | No amount recorded. Condition No dollar figure is recorded because the Idaho Code does not contain one for this offense. § 49-236(2) makes a violation of chapter 6 an infraction, and § 18-113A caps any infraction at $300 while leaving the actual amount for this one to the fixed penalty in Idaho Supreme Court Infraction Rule 9, which is a court rule and not part of the Code. For comparison, the separate seat belt offense in § 49-673(3)(b) is $10 and carries no violation points. |
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
Idaho sets this in Idaho Code § 49-672. Read it at the source.
This is information, not legal advice. A city or county in Idaho 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
- Idaho Code § 49-672
- Source
- legislature.idaho.gov
- Jurisdiction
- Idaho (ID), 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
- Amendment history
- 1995, ch. 55, § 1; am. 2005, ch. 209, § 1