BWK is the abbreviation of:

• Berwick-upon-Tweed railway station, a railway station in Northumberland, England, National Rail station code
• Bol Airport or Brač Airport, an airport on the Croatian island of Brač, close to the town of Bol, IATA code
• Brandon Wheat Kings, a Western Hockey League team based in Brandon, Manitoba.
• Brian Wilson Kernighan, a computer scientist
• Brillouin–Wentzel–Kramers approximation, a method for approximating many common differential equations in physics.
• Brunswick, Georgia
• Brunswick railway station, Melbourne
• Bund Westdeutscher Kommunisten, see League of West German Communists, was a Maoist communist political organization in the Federal Republic of Germany, active between 1980 and 1995
• Cold desert climate or cool arid climate