HHHS may refer to:
Lebanon Houssam Hariri High School, in Sharhabil, Saida
Australia Hunters Hill High School, in Sydney, New South Wales
South Africa Hottentots Holland High School, in Western Cape
United States Hasbrouck Heights High School in New Jersey Haddon Heights High School, in New Jersey Hamilton Heights High School, in Arcadia, Indiana Hatboro-Horsham Senior High School, in Horsham, Pennsylvania Hendrick Hudson High School in Montrose, New York Heritage Hills High School, in Lincoln City, Indiana Herbert Hoover High School (disambiguation) Houston Heights High School, in Houston, Texas Hunter Huss High School, in Gastonia, North Carolina