New Jersey car seat law (2026)
Children younger than 2 years and less than 30 pounds must ride in a rear-facing infant seat; children younger than 4 years and less than 40 pounds in a rear-facing seat until outgrowing the manufacturer's top height or weight recommendations, or in a forward-facing seat; children younger than 8 years and less than 57 inches in a forward-facing seat (until outgrown) or booster.
| Provision | What the IIHS table lists for New Jersey |
|---|---|
| Child restraint | Children younger than 2 years and less than 30 pounds must ride in a rear-facing infant seat; children younger than 4 years and less than 40 pounds in a rear-facing seat until outgrowing the manufacturer's top height or weight recommendations, or in a forward-facing seat; children younger than 8 years and less than 57 inches in a forward-facing seat (until outgrown) or booster. |
| Adult seat belt | No adult-belt height/weight exception is listed while the child-restraint law applies. |
| Rear seat | Children 7 years and younger and less than 57 inches must be in the rear seat if available. No child may be secured in a rear-facing infant seat in a front seat equipped with a passenger-side airbag that is not disabled. |
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 New Jersey?
Children younger than 2 years and less than 30 pounds must ride in a rear-facing infant seat; children younger than 4 years and less than 40 pounds in a rear-facing seat until outgrowing the manufacturer's top height or weight recommendations, or in a forward-facing seat; children younger than 8 years and less than 57 inches in a forward-facing seat (until outgrown) or 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 New Jersey?
No adult-belt height/weight exception is listed while the child-restraint law applies. 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 New Jersey require children to ride in the back seat?
Children 7 years and younger and less than 57 inches must be in the rear seat if available. No child may be secured in a rear-facing infant seat in a front seat equipped with a passenger-side airbag that is not disabled. (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 New Jersey 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: New Mexico · New York · North Carolina · North Dakota · Ohio