Bicycle Helmet Laws in Delaware
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
Delaware requires a bicycle helmet for every rider under 18 — in practice, every rider except adults aged 18 and over. The same rule extends to children carried as passengers in a child seat or trailer. Civil violation; fine of up to $25 for a first offense. The court must waive the fine on proof that the rider has obtained a CPSC-certified helmet within 30 days. See 21 Del. Code § 4198K (Bicycle helmets required for persons under 18). 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 18 or older, Delaware doesn't require you to wear a helmet by state law. Riders under 18 (and any child carried as a passenger) must wear a helmet that meets the CPSC (16 C.F.R. Part 1203). 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