Leon F. Litwack (born December 2, 1929) is an American historian whose scholarship focuses on slavery, the Reconstruction Era of the United States, and its aftermath into the 20th century. He won a National Book Award, the Pulitzer Prize for History, and the Francis Parkman Prize for his 1979 book Been In the Storm So Long: The Aftermath of Slavery. He also received a Guggenheim Fellowship.
After the spring 2007 semester he retired to emeritus status at the University of California Berkeley, where he received the Golden Apple Award for Outstanding Teaching that year. Then he went on a lecture tour that led to his latest book, How Free Is Free?: The Long Death of Jim Crow (2009).