William Thomas Hagan (December 19, 1918 – August 5, 2011) was a history professor at the University of Oklahoma and an author.
He was born in Huntington, West Virginia.
He served in World War II.
He taught at the University of North Texas in Denton, in the SUNY system, and then joined the University of Oklahoma faculty where he was a professor emeritus.
[1] He was married to Charlotte "April" Hagan with whom he had four children.