BHA may refer to:

• Berkshire Hathaway Assurance, an American company
• Backcountry Hunters & Anglers, Montana, U.S.
• Boston Housing Authority, an American public agency
• Brighter Horizons Academy, an Islamic college in Garland, Texas, U.S.
• Brighton & Hove Albion F.C., an English association football club
• British Homeopathic Association
• British Horseracing Authority
• British Hospitality Association
• British Humanist Association (now Humanists UK)
• Buddha Air, a Nepalese airline, ICAO code BHA
• Bush Heritage Australia

• Beta hydroxy acid, a type of organic compound
• Bottom hole assembly, a component of a drilling rig
• Butylated hydroxyanisole, a food additive
• BHA (for "Butt-Head Astronomer"), a code-name for the Power Macintosh 7100 computer

• Bahamas, UNDP country code
• Bibliography of the History of Art, an electronic database by Getty Research Institute
• Los Perales Airport, Bahía de Caráquez, Ecuador, IATA code BHA
• Area code 242 (BHA), North American dialling code for The Bahamas
• Bharia language, ISO 939-3 code bha
• Binhai railway station, China Railway Pinyin code BHA
• Bute House Agreement, a former power-sharing agreement in the Scottish government