BNA may stand for:
- Basle Nomina Anatomica, the first revision of anatomic nomenclature
- Burma National Army
- British Naturalists' Association
- British North America, a former name for Canada
- British North America Acts, the original Constitutional Acts of Canada
- Bureau of National Affairs, a U.S. commercial publisher
- Banco de la Nación Argentina
- BNA Records, a record label
- Bhartendu Academy of Dramatic Arts, a theatre training institute in Lucknow, India
- Nashville International Airport (IATA airport code)