Warren T. Treadgold (born April 30, 1949, Oxford, England) is an American historian and specialist in Byzantine studies. He is the National Endowment for the Humanities Professor of Byzantine Studies at Saint Louis University. His interest in the political, economic, military, social, and cultural history of the Byzantine Empire extends to the Byzantine historians themselves. Treadgold has also taught at UCLA, Stanford, Hillsdale, Berkeley, and Florida International University.^[1]

He has been married since September 25, 1982 to Irina Andreescu-Treadgold.

Treadgold holds an AB from Harvard University (1970) and a PhD from the same university (1977).^[1]

• The University We Need: Reforming America’s Higher Education (New York: Encounter Books, 2018);
• The Middle Byzantine Historians (New York: Palgrave Macmillan, 2013);
• The Early Byzantine Historians (New York: Palgrave Macmillan, 2007);
• A Concise History of Byzantium (New York: Palgrave Macmillan, 2001);^[2]
• Treadgold, Warren (1997). A History of the Byzantine State and Society. Stanford, California: Stanford University Press. ISBN 0-8047-2630-2.^[3]
• Byzantium and Its Army, 284–1081 (Stanford: Stanford University Press, 1995);^[4]
• Treadgold, Warren (1988). The Byzantine Revival, 780–842. Stanford, California: Stanford University Press. ISBN 978-0-8047-1462-4.^[5]
• The Byzantine State Finances in the Eighth and Ninth Centuries (New York: East European Monographs, 1982); and
• The Nature of the Bibliotheca of Photius (Washington, D.C.: Dumbarton Oaks, 1980).