Bicycle Helmet Laws in Iowa
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
Iowa has no statewide bicycle-helmet law that applies to adult riders. Iowa has no statewide bicycle-helmet law and Iowa Code § 321.236(13) expressly preempts cities and counties from enacting local helmet ordinances for adult cyclists. Helmets remain unregulated for adults; some youth cycling programs require CPSC-certified helmets as a condition of participation.
What this means in practice
Because there's no statewide age mandate, adult riders in Iowa aren't legally required to wear a helmet — but cycling-injury research still strongly recommends one. Local cities, school districts, and bike-share programs can impose stricter rules, so check the municipal code wherever 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