Marine Aircraft Group 13 is a United States Marine Corps aviation unit based at Marine Corps Air Station Yuma that is currently composed of one McDonnell Douglas AV-8B Harrier II squadron, three Lockheed Martin F-35B Lightning II squadrons, an unmanned aerial vehicle squadron, a maintenance and logistics squadron, and a wing support squadron. The group falls under the command of the 3rd Marine Aircraft Wing and the I Marine Expeditionary Force.