William Cameron McKay (1824–1893) was a scout in the Snake War and Modoc War, a Captain in the U.S. Army, a member of the , and a physician and surgeon. William Cameron McKay was born at Fort George on May 18, 1824, what is now Astoria, Clatsop County, Oregon. He was the son of a famous trapper and guide Thomas McKay and his wife, Timmee T'lkul Tchinouk, daughter of Tshinouk (Chinook) chief Concomly. He was a grandson of Alexander MacKay and the step-grandson of Dr. John McLoughlin. He was appointed on several occasions to serve as doctor at both the Warm Springs and Umatilla reservations.