Maine car seat law (2026)
Children younger than 2 years, or until exceeding the manufacturer's recommended weight or height limit, must ride in a rear-facing restraint; children 2 years and older and less than 55 pounds in a child restraint with an internal harness per the manufacturer's instructions; children less than 80 pounds who are shorter than 57 inches and less than 8 years in a booster.
| Provision | What the IIHS table lists for Maine |
|---|---|
| Child restraint | Children younger than 2 years, or until exceeding the manufacturer's recommended weight or height limit, must ride in a rear-facing restraint; children 2 years and older and less than 55 pounds in a child restraint with an internal harness per the manufacturer's instructions; children less than 80 pounds who are shorter than 57 inches and less than 8 years in a booster. |
| Adult seat belt | Through age 17 once taller than 57 inches or over 80 pounds, a seat belt is required. |
| Rear seat | Children 11 years and younger must be in the rear seat if available. |
The law names ages — the seat's specs decide the switch
Every threshold above meets a spec question: is your child still within the seat's own height/weight limits for that mode? That's published manufacturer data, and it's what this site organizes:
- Keeping a toddler rear-facing longer → extended rear-facing seats (higher rear-facing limits).
- Moving from harness to booster → booster seats, incl. narrow boosters for 3-across.
- One seat across the whole journey → all-in-one (4-in-1) seats.
- Not sure a seat works in your car → how to check fit.
FAQ
What is the car seat law in Maine?
Children younger than 2 years, or until exceeding the manufacturer's recommended weight or height limit, must ride in a rear-facing restraint; children 2 years and older and less than 55 pounds in a child restraint with an internal harness per the manufacturer's instructions; children less than 80 pounds who are shorter than 57 inches and less than 8 years in a booster. (As published in the IIHS state law table, retrieved 2026-07-16 — a summary, not legal advice.)
When can a child use just a seat belt in Maine?
Through age 17 once taller than 57 inches or over 80 pounds, a seat belt is required. Best practice is to keep using a booster until the adult belt fits properly — lap flat on the thighs, shoulder belt across the chest — regardless of the legal minimum.
Does Maine require children to ride in the back seat?
Children 11 years and younger must be in the rear seat if available. (As published in the IIHS state law table.) NHTSA's recommendation goes further: all children under 13 in the back seat, and never a rear-facing seat in front of an active passenger airbag.
Is the Maine law the same as best practice?
No — the law is the legal minimum. NHTSA recommends keeping children in each stage (rear-facing, forward-facing harness, booster) up to the seat's own height and weight limits, which usually lasts longer than the law requires.
All states: car seat laws by state · nearby in the list: Maryland · Massachusetts · Michigan · Minnesota · Mississippi