Tools · Car Seat
Idaho Car Seat & Booster Checker (2026)
Enter your child's age, height, and weight to see the minimum seat stage Idaho law requires and the first-offense fine (~$84 total (no statutory dollar amount)). This is the legal minimum — not best safety practice.
Idaho car seat checker
4′9″ = 57 in. Enter only the boxes you have. Idaho uses a restraint is required through age 6; a seat belt is allowed at 7. There is no 4′9″ or weight line in the statute, and the word "booster" does not appear..
Idaho does not legislate rear-facing vs forward-facing by age; it requires a restraint appropriate per the manufacturer's instructions. Best practice from AAP (the pediatricians' association) and NHTSA (the federal highway-safety agency), not Idaho law: rear-facing to age 2+, then a harness, then a booster.
- Child
- Not entered
- Minimum legal stage
- Enter age / height / weight
- Booster-exit rule
- a restraint is required through age 6; a seat belt is allowed at 7. There is no 4′9″ or weight line in the statute, and the word "booster" does not appear.
- First-offense fine
- ~$84 total (no statutory dollar amount)
Plain-language summary, not legal advice.
This shows the minimum legal requirement in Idaho, not best safety practice, which is usually stricter, and not legal or safety advice. Always follow your car seat's manufacturer instructions. For the full four-stage rules, front-seat rule, and citation, see the Idaho car seat law reference, cited to Idaho Code §49-672 (last reviewed 2026-07-11).
How Idaho car seat law works
Idaho has one of the weakest child restraint laws of any state, and being precise about it matters. The statute covers a child 6 years old or younger, and it uses age alone. There is no 4′9″ height line, no weight number, and the word "booster" is not in the text. It simply requires a "child safety restraint" that meets the federal FMVSS 213 standard. Because the statute is silent on orientation, "rear-facing until 2" is AAP/NHTSA best practice in Idaho, not law. Two honesty notes: the statute names no fine, so the roughly $84 figure comes from the Idaho Supreme Court infraction schedule (about $27.50 plus court costs), not the code itself; and there is no general back-seat rule, only a narrow line that an unrestrained child goes in the rear seat when all belts are already taken.
This checker shows the Idaho minimum legal requirement — not best safety practice, which is usually stricter — and is not legal or safety advice. For the full four-stage rules, front-seat rule, and citation, see the Idaho car seat law reference.
Car seat checkers for other states
Same tool, each with its own booster-exit rule.