Tools · Car Seat
Mississippi Car Seat & Booster Checker (2026)
Enter your child's age, height, and weight to see the minimum seat stage Mississippi law requires and the first-offense fine ($25). This is the legal minimum — not best safety practice.
Mississippi car seat checker
4′9″ = 57 in. Enter only the boxes you have. Mississippi uses the booster is required for ages 4–6 who are under 4′9″ OR under 65 lb; reaching age 7, or hitting both 4′9″ and 65 lb, exits it.
Mississippi 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 Mississippi 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
- the booster is required for ages 4–6 who are under 4′9″ OR under 65 lb; reaching age 7, or hitting both 4′9″ and 65 lb, exits it
- First-offense fine
- $25
Plain-language summary, not legal advice.
This shows the minimum legal requirement in Mississippi, 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 Mississippi car seat law reference, cited to Miss. Code §63-7-301 (last reviewed 2026-07-11).
How Mississippi car seat law works
Mississippi’s booster rule has a narrower age band than most states, and that trips people up. The booster mandate covers ages 4 through 6 only: a child at least 4 but younger than 7 who is shorter than 4′9″ OR weighs under 65 lb must ride in a belt-positioning booster. It ends at age 7, not 8. Below age 4, the law simply requires an appropriate child restraint device and says nothing about orientation, so rear-facing until 2 is best practice here, not law. Mississippi also does not legislate a rear-seat age, so keeping younger children in the back is a recommendation rather than a rule. The fine is a flat $25, and the statute is explicit that not using a device is not by itself negligence.
This checker shows the Mississippi 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 Mississippi car seat law reference.
Car seat checkers for other states
Same tool, each with its own booster-exit rule.