William Edward Leuchtenburg (born September 28, 1922 in Ridgewood, New York) is William Rand Kenan Jr. professor emeritus of history at the University of North Carolina at Chapel Hill. He is a leading scholar of the life and career of Franklin Delano Roosevelt.
Leuchtenburg was born in New York City, and received his B.A. degree in 1943 from Cornell University, where he was inducted into the Phi Beta Kappa Society. He later received his Ph.D. from Columbia University in 1951.
He won the 2007 North Carolina Award for Literature.
He is a past president of the American Historical Association, the Organization of American Historians, and the Society of American Historians. Eric Foner is the only other historian to claim that distinction.