Bernard Stanley Bachrach (born 1939) is an American historian. He taught history at the University of Minnesota from 1967 until his retirement in 2020. He specializes in the Early Middle Ages, mainly on the topics of medieval warfare, medieval Jewry, and early Angevin history (he has written a biography of Fulk Nerra).
Bachrach received the CEE Distinguished Teaching Award from the University of Minnesota in 1993 and entered the College of Liberal Arts Scholars of the College at Minnesota in 2000. He has also been the recipient of a McKnight Research Award. He has translated the Liber historiae Francorum from Latin into English.