Ethan H. Shagan (born November 16, 1971) is an American historian of early modern Britain.
Professor Shagan is an Associate Professor of History at the University of California, Berkeley, where he also serves as Director of the Center for British Studies. He received his undergraduate degree from Brown University and his Masters and Ph.D. from Princeton University. He was formerly a Junior Fellow of the Harvard Society of Fellows, and Wayne V. Jones Research Professor in History at Northwestern University where he received the E. LeRoy Hall Award for Distinguished Teaching. He is the recipient of a number of awards including the Herbert Baxter Adams Prize and Morris D. Forkosch Prize from the American Historical Association, the Roland Bainton Prize from Sixteenth Century Society and Conference, and the Whitfield Prize of the Royal Historical Society.