This 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
Indiana has no statewide bicycle-helmet law that applies to adult riders. Indiana has no statewide bicycle-helmet law. A handful of municipalities — including Carmel and Bloomington — encourage helmet use through public-safety campaigns but do not mandate it.
What this means in practice
Because there's no statewide age mandate, adult riders in Indiana 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.