United States military aircraft national insignia

This is a listing of the nationality markings used by military aircraft of the United States, including those of the US Army, US Air Force, US Navy, US Marine Corps, US Coast Guard and their predecessors. The Civil Air Patrol is also included for the World War II period because it engaged in combat operations (primarily anti-submarine flights) which its July 1946 charter since explicitly forbade.

Official dates refers to when a new insignia was officially ordered but implementation was not always immediate.