Ultralight aircraft in the United States

Ultralight aircraft in the United States are not considered to be light-sport aircraft, are not regulated as aircraft, and are exempt from aircraft rules by the FAA. Instead, they are treated as powersport items and have to follow their own ruleset, FAR-103, which is the most compact aviation regulation in existence.

While ultralights in other countries might have airworthiness certificates, an airworthiness certificate is not allowed for an ultralight vehicle in the USA. Any existing airworthiness certificate has to be surrendered to the issueing agency, including foreign agencies, before usage as an ultralight vehicle becomes legal. The FAA emphasizes that airworthiness and compliance with FAR-103 is the responsibility of the user during every flight.

In the United States, ultralights are not registered, nor is the pilot required to have a pilot's certificate.