HX or Hx may refer to:
Places HX postcode area, England Harolds Cross, Dublin, Ireland
Science and technology Dolby HX, in analog audio recording .hx, a Haxe source code file Hydrogen halide (HX), a series of chemicals Medical history (Hx or Hx) Heat exchanger (HX), in temperature control
Transport Hummer HX, a 2008 concept car HX convoys of Allied ships, 1939–1945 RMMV HX range of tactical trucks, 2003 Hong Kong Airlines (IATA code HX since 2007) Kadapa railway station, India (station code:HX)
Other uses Ĥ (Hx), a letter in Esperanto Human experience; see Customer experience and User experience
See also Hex (disambiguation)