Bicycle Helmet Laws in Maine
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
Maine 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. 29-A M.R.S. § 2323 requires every operator and passenger under 16 to wear a properly fitted helmet that meets ASTM, Snell, or ANSI standards. A first violation results in a warning; subsequent violations carry a fine of up to $25, which a court may waive on proof of helmet purchase. See 29-A M.R.S. § 2323 (Bicycle and roller-ski 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, Maine 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 ASTM, Snell, or ANSI (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