BSY most commonly refers to B. S. Yediyurappa, the former Chief Minister of Karnataka.
BSY may also refer to:
Big Sky Airlines; ICAO airline code BSY Bored Suburban Youth, American hardcore punk band, 1985-88 Brondesbury railway station, London; Network Rail station code BSY Bardera Airport, in Gedo, Somalia; ICAO airport code BSY Black Suit Youth, American alternative punk band 2004-present