Steven Wayne Lindsey (born August 24, 1960) is a retired U.S. Air Force officer and NASA astronaut.

In 1989, Lindsey attended the USAF Test Pilot School at Edwards Air Force Base, California.

In 1990, he was assigned to Eglin Air Force Base, Florida, where he conducted weapons and systems tests in F-16 and F-4 aircraft.

Upon graduation in June 1994, he was reassigned to Eglin Air Force Base, Florida, as an Integrated Product Team leader in the USAF SEEK EAGLE Office where he was responsible for Air Force weapons certification for the F-16, F-111, A-10, and F-117 aircraft.

Initially assigned to flight software verification in the Shuttle Avionics Integration Laboratory (SAIL), Lindsey also served as the Astronaut Office representative working on the Multifunction Electronic Display System (MEDS) program, a glass cockpit Space Shuttle upgrade program, as well as a number of other advanced upgrade projects.

More recently, he served as the Chief of International Space Station Operations for the astronaut office, responsible for integrating astronaut, civil service, and contractor activities in providing support to all aspects of the development, testing, crew training and operations of the International Space Station.

STS-87 (November 19 to December 5, 1997) was the fourth U.S Microgravity Payload flight and focused on experiments designed to study how the weightless environment of space affects various physical processes, and on observations of the Sun’s outer atmospheric layers.

During the EVA, Lindsey piloted the first flight of the AERCam Sprint, a free-flying robotic camera.

STS-95 (October 29 to November 7, 1998) was a 9-day mission during which the crew supported a variety of research payloads including deployment and retrieval of the Spartan solar-observing spacecraft, the Hubble Space Telescope Orbital Systems Test Platform, and investigations on space flight and the aging process.

In addition to installing and activating the Joint Airlock, the crew also performed the first spacewalk from Quest.