Colonel Gary Eugene Payton, USAF, is an American astronaut and USAF Manned Spaceflight Engineer. Payton flew on the STS-51-C mission aboard the Space Shuttle Discovery in January 1985. He later served as Deputy Undersecretary of the Air Force under the Bush and Obama Administrations.

STS-51-C was the 15th flight of NASA's Space Shuttle program, and the third flight of Space Shuttle Discovery. It launched on January 24, 1985, and made the fourth shuttle landing at Kennedy Space Center, Florida, on January 27, 1985. STS-51-C was the first shuttle mission to deploy a dedicated United States Department of Defense (DoD) payload, and consequently many mission details remain classified.