Bicycle Helmet Laws in New Hampshire
Last reviewed by BikeSize EditorialThis guide is for general information only and is not legal advice. Laws change - verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
The rule
New Hampshire requires a bicycle helmet for any rider under the age of 16. The same rule extends to children carried as passengers in a child seat or trailer. RSA 265:144 requires every operator and passenger under 16 to wear a properly fitted helmet that meets ANSI, Snell, or ASTM standards on any public way, public bicycle path, or other public right-of-way. The first offense is a warning; subsequent offenses carry a fine of up to $25, which a court may waive on proof of helmet purchase. See RSA 265:144 (Bicycle helmets). Read the national helmet laws guide for comparison. Confirm equipment fit with the helmet size calculator before relying on an age rule alone.
Statute
What this means in practice
If you're 16 or older, New Hampshire doesn't require you to wear a helmet by state law. Riders under 16 (and any child carried as a passenger) must wear a helmet that meets the ANSI Z90.4, Snell, or ASTM (a CPSC-certified helmet meets these specifications) standard.
Cities can be stricter than the state floor, and bike-share systems often require helmets regardless of age. If you're renting or commuting in a major city, confirm the local rule before you ride.
Get the fit right
Find your CPSC-certified helmet size
A helmet that meets the law but does not fit will not protect you. Measure your head circumference, then shop a size band you can trust.
Open the helmet size calculator