Clifford Hansen, American rancher and politician, 26th Governor of Wyoming (died 2009)

Clifford Peter Hansen was an American politician from the state of Wyoming. A Republican, he served as the 26th governor of Wyoming from 1963 to 1967 and subsequently as a United States senator from 1967 to 1978. He served as a member of the board of trustees from 1946–1966 to his alma mater, the University of Wyoming located in Laramie. He was also a county commissioner in Jackson, the seat of Teton County in northwestern Wyoming. Before his death on October 20, 2009, he was the oldest living former U.S. Senator as well as the third oldest living former U.S. Governor.

The governor of Wyoming is the head of government of Wyoming, and the commander-in-chief of the Wyoming's military department.