BNO may refer to:

British National (Overseas), a class of British nationality

• British National (Overseas) passport

• Baksan Neutrino Observatory, Caucasus mountains, Russia

• BNO News, a news agency

• Boys Night Out (band), an emo/post-hardcore band from Ontario, Canada.

• Burns Municipal Airport in Burns, Oregon, which have FAA identifier BNO

• The Beano, a British comic

• Building network operator, UK, concerned with electrical distribution in a building

• Bowels not open, i.e. constipation