HHW may refer to:
hhw (trigraph), used for the Dene Suline language Hahndorf Hill Winery, in South Australia Heating hot water, water used for heating Highland Hall Waldorf School, in Northridge, California, United States Hip Hop Weekly (magazine) Household hazardous waste Stan Stamper Municipal Airport, in Hugo, Oklahoma, USA Harmony Hall West, headquarters of the Barbershop Harmony Society