BSU may refer to:
Universities Baku State University Baikal State University, Irkutsk, Russia Buryat State University, Ulan-Ude, Russia Ball State University, Indiana, USA Batangas State University Apolinario R. Apacible School of Fisheries (BatSU) Bath Spa University, UK Beijing Sport University Belarusian State University Bemidji State University Benguet State University (BengSU) Boise State University, Idaho, USA Bowie State University, Maryland, USA Bukidnon State University (BukSU) Bulacan State University (BulSU) Bridgewater State University, Massachusetts, USA
Other uses Bangladesh Students Union, a political organization in Bangladesh Baluchistan States Union, a province of Pakistan that existed from 1952 to 1955 Baptist Student Union Behavioral Science Unit, the former name for the Federal Bureau of Investigation's Behavioral Analysis Unit BISU Union, the Student Union of Beijing International Studies University (BISU) British Seafarers' Union Britannia Staff Union Federal Bureau for Maritime Casualty Investigation (Bundesstelle für Seeunfalluntersuchung, BSU) , Classifying space for special unitary group , Classifying space for infinite special unitary group