BDU may refer to:
Airports Bardufoss Airport (IATA code: BDU), northern Norway Boulder Municipal Airport (FAA LID: BDU), Colorado, US
Education Bahir Dar University, Ethiopia Baku State University, Azerbaijan Bharathidasan University, Tamil Nadu, India Brown Debating Union, Brown University, Rhode Island, US
Military Battle Dress Uniform, historical American camo Befehlshaber der U-Boote, head of the German Navy's U-Boat arm in WWI and WWII
Other uses B.D.U, a South Korean boy band Bizkaia–Durango, a cycling team based in Spain Broadcast distribution undertakings, the legal term for Canadian multichannel television providers Oroko language, spoken in Cameroon (ISO 639-3:bdu) Data Security Threats Database (BDU), a Russian software vulnerability database