Thomas F. Madden (born 1960) is an American historian, a former Chair of the History Department at Saint Louis University in St. Louis, Missouri, and Director of Saint Louis University's Center for Medieval and Renaissance Studies. A specialist on the Crusades, he has often commented in the popular media after the events of September 11, to discuss topics such as how Muslims have viewed the medieval Crusades and their parallels to today's interventions in the Middle East.