Ian Pretyman Stevenson (October 31, 1918 – February 8, 2007) was a Canadian-born U.S. psychiatrist. He worked for the University of Virginia School of Medicine for fifty years, as chair of the department of psychiatry from 1957 to 1967, Carlson Professor of Psychiatry from 1967 to 2001, and Research Professor of Psychiatry from 2002 until his death.