Jack R. Lousma, American colonel, astronaut, and politician
Col. Jack Robert Lousma USMC, Ret. (born February 29, 1936) is an American astronaut, aeronautical engineer, retired United States Marine Corps officer, former naval aviator, NASA astronaut, and politician. He was a member of the second crew, Skylab-3, on the Skylab space station in 1973. In 1982, he commanded STS-3, the third Space Shuttle mission. Lousma was inducted into the United States Astronaut Hall of Fame in 1997. He is the last living crew member of both of his spaceflights.

Lousma was later the Republican Party nominee for a seat in the United States Senate from Michigan in 1984, losing to incumbent Carl Levin who won his second of six terms as a result.