HW

HW or Hw may refer to:

Transportation

 * Haridwar Railway Station, Haridwar, India, station code
 * Hello (airline), IATA airline designator
 * North-Wright Airways, IATA airline designator

Other uses

 * George H. W. Bush (1924–2018), 41st President of the United States
 * Hartford Whalers, US ice hockey team
 * Hot Wheels, toy cars
 * Hantzsche–Wendt manifold
 * hectowatt (hW) metric unit of power, 1 hW = 100 watt
 * Hwair (ƕ), a Gothic letter
 * Voiceless labialized velar approximant /ʍ/, often transcribed /hw/
 * Homework, tasks assigned to students to be completed out of class
 * Hydraulic warfare