Nh Car Seat Laws 2023: What To Know

In New Hampshire, specific laws and regulations are in place to ensure that children are properly secured in vehicles. As we enter 2023, it’s crucial for parents and caregivers to stay informed about the latest car seat laws in the state. Let’s take a closer look at what you need to know to keep your child safe and compliant with Nh Car Seat Laws.

New Hampshire Car Seat Law

New Hampshire Infant Car Seat Law

In New Hampshire, infants must be secured in a rear-facing car seat until they reach the age of 1 or weigh 20 pounds. It is recommended to keep infants in a rear-facing position for as long as possible, even beyond the minimum requirements stated by law.

New Hampshire Rear-facing Car Seat Law

New Hampshire law mandates that children under the age of 2 must be restrained in a rear-facing car seat unless they have reached the maximum height or weight limit specified by the manufacturer of the seat. This law aims to protect young children by providing them with the best possible protection in the event of a crash.

New Hampshire Forward-facing Car Seat Law

Once a child outgrows the rear-facing car seat, they should transition to a forward-facing car seat with a harness. New Hampshire law requires children to remain in a forward-facing car seat until they are at least 5 years old or weigh 40 pounds, whichever comes first.

Child Booster Seat Laws in New Hampshire

Children who have outgrown their forward-facing car seats should use booster seats until they can properly fit into an adult seat belt. New Hampshire law states that children must use a booster seat until they are at least 7 years old and meet the height and weight requirements to safely use a seat belt alone.

Leaving Child in Car Law in New Hampshire

Leaving a child unattended in a motor vehicle can be dangerous and is generally discouraged. While there is no specific law in New Hampshire that prohibits leaving a child alone in a car, it is important to consider the potential risks involved. Extreme temperatures, accidental vehicle movement, and other hazards can pose serious threats to a child’s safety.

New Hampshire Seat Belt Laws for Children

All children under the age of 18 in New Hampshire must be properly restrained using a seat belt or an appropriate child restraint system. The specific requirements for child restraints depend on the child’s age, weight, and height as mentioned earlier.

Taxi Car Seat Law in New Hampshire

New Hampshire law exempts taxi drivers from providing car seats for passengers. However, it is strongly recommended that parents provide their own car seats to ensure the safety of their children while traveling in taxis. It is essential to follow best practices and secure children in appropriate car seats whenever possible, regardless of exemptions in the law.

New Hampshire Child Safety Seat Tips

  1. Always choose a car seat appropriate for your child’s age, weight, and height.
  2. Follow the manufacturer’s instructions for installation and use of the car seat.
  3. Ensure that the car seat is securely installed in the vehicle using either the vehicle’s seat belt or LATCH system.
  4. Double-check that the car seat is tightly secured and does not move more than an inch in any direction.
  5. Make sure the harness straps are snug and properly positioned on your child, with the chest clip at armpit level.
  6. Keep children rear-facing as long as possible, following the recommended guidelines.
  7. Transition children to forward-facing seats with harnesses when they outgrow their rear-facing seats.
  8. Use booster seats until children can properly fit into adult seat belts.
  9. Set a good example by always wearing your own seat belt and practicing safe driving habits.

Consequences for Obey NH Car Seat Laws

Failure to comply with New Hampshire car seat laws may result in fines and penalties. The specific consequences vary depending on the jurisdiction and circumstances. If law enforcement discovers a violation, they may issue a citation, and the fines can range from around $50 to over $100. Additionally, points may be added to the driver’s license, which can impact insurance rates and driving privileges.

Nh Car Seat Laws


When Can My Child Sit in the Front Seat in New Hampshire?

New Hampshire does not have a specific law regarding when a child can sit in the front seat. However, it is generally recommended to keep children in the back seat until they reach the age of 8. This recommendation is based on safety considerations, as the back seat provides better protection in the event of a crash, especially for younger children who are more vulnerable to injury.

Is it Illegal to Smoke in a Car with a Child in New Hampshire?

It is illegal to smoke in a motor vehicle carrying a passenger who is under the age of 18 in New Hampshire. This law aims to protect children from the harmful effects of secondhand smoke. Violating this law may result in fines.

Where can I get my car seat checked or installed in New Hampshire?

To ensure proper installation and use of your car seat, you can visit a local inspection station or contact certified Child Passenger Safety Technicians (CPSTs) in New Hampshire. These technicians are trained to provide guidance, check the installation, and address any concerns related to child safety seats.

You can find a list of inspection stations and CPSTs in your area by visiting the National Highway Traffic Safety Administration (NHTSA) website or contacting local law enforcement agencies.

Can I use a used car seat in New Hampshire?

Using a used car seat in New Hampshire is allowed as long as it meets certain criteria:

  • The car seat is not expired. Car seats typically have an expiration date stamped on them, usually around six years after the manufacturing date.
  • The car seat has never been involved in a moderate to severe crash. If a car seat has been in a crash, it may have sustained unseen damage, compromising its effectiveness.
  • The car seat has all its parts and components intact, including the harness straps, buckles, and adjusters.
  • The car seat’s labels and instructions are still readable and available for reference.

It is recommended to exercise caution when using a used car seat and ensure that it meets safety standards and has not been recalled. If possible, obtaining a car seat from a trusted source or purchasing a new one can provide added peace of mind regarding its safety and history.


Remember, the primary goal of New Hampshire’s car seat laws is to protect our precious children during every car journey. By understanding and following these regulations, we can significantly reduce the risk of injury or harm in the event of an accident. Stay up to date with any changes in the law, get your car seats checked or installed by certified technicians, and always prioritize the safety of your child while on the road.