HLU

HLU could refer to:

• Heaviside–Lorentz units; a system of units for electromagnetism.
• Helensburgh Upper railway station, Scotland; National Rail station code HLU.
• Heli Union Heli Prestations airline; ICAO airline code HLU.
• Hieroglyphic Luwian language; ISO 639 language code HLU.
• Nesson Airport, Houaïlou, New Caledonia; IATA airport code HLU.