Donald Holst Clausen (April 27, 1923 – February 7, 2015) was an American businessman, World War II veteran, and politician who served ten terms as a U.S. Representative from California from 1963 to 1983.

He served as a carrier pilot in the Asiatic-Pacific Theater of the Second World War from 1944 to 1945,[1] flying F4U Corsair aircraft.

[1] Clausen authored the bill creating the Lady Bird Johnson Grove in the Redwood National Park.

[1] He served as director, special programs, Federal Aviation Administration from 1983 to 1990 and was a resident of Santa Rosa, California, after his Congressional tenure ended.

[1] The Don Clausen Fish Hatchery in Sonoma County[7] was named in his honor and the Redwood National Park Bypass on US Highway 101 was renamed the Don Clausen Highway in 1996 by act of the California Legislature due to his efforts at obtaining appropriations for building that road and the Redwood National Park Visitor Center.