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Massachusetts Car Seat Laws You Need To Know (2022)

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When you’re planning a family trip to Massachusetts, it’s important that you make sure to follow local (or exceed) the child passenger safety laws.

Official Massachusetts Car Seat Laws

You can find the official Massachusetts car seat law in Chapter 90, Section 7AA of the Commonwealth’s General Laws.


Massachusetts Rear-Facing Car Seat Law

Massachusetts does not specify how long children must be rear facing. At a minimum, parents are required to follow the guidelines set forth by the manufacturer of their specific car seat (referred to as “proper use”).

Some manufacturers permit children to forward face as young as 1 year as long as they weigh at least 22 pounds, while other manufacturers require toddlers to be at least 2 years old to forward face.

Rear-facing is significantly safer for children as it dramatically decreases the risk of head and neck injuries. This resource is full of great information.

The current guidance from the American Academy of Pediatrics is that children should remain rear-facing to the limits of their convertible car seat. Nearly all convertible car seats today will accommodate kids up to 40 pounds (they have variable height limits so read your manual) – the size of an average 4 year old – rear facing.

Though it’s not specified by the law, research indicates that kids should continue riding in a harnessed car seat (whether rear-facing or forward-facing) until at least age 5, 40 pounds and mature enough to sit properly for the whole drive.


Massachusetts Booster Seat Law

Booster seat laws in Massachusetts apply to kids until they reach 4’9″ or 8 years old. Be sure to follow manufacturer minimum and maximum size requirements for your booster seat – most manufacturers now require a minimum of 4 years old, 40″ tall and 40 pounds.

Most children do not fit properly in an adults seatbelt until 10-12 years old, when they pass the 5-step test.


When Can Kids Ride In the Front Seat In Massachusetts?

There’s no law in Massachusetts on when kids can ride in the front seat, but many car manufacturers specify that kids should not ride in the front until age 13. Here’s an excellent explanation of why.


Upcoming Changes To Massachusetts Car Seat Law

Mass car seat laws haven’t been updated in years, and they do not reflect our current knowledge of child passenger safety.

Get the latest from Mass.gov


If you’ll be flying to Massachusetts, be sure to bring one of these travel car seats. If you’re planning a family road trip, consider one of these comfortable convertible car seats or comfortable booster seats. Check more car seat laws by state as you plan your route.

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