HH

HH may stand for:
* The blood group hh
* Hahnium, a disputed abbreviation for the chemical element name
* Hakainde Hichilema, Zambian political party leader
* Hamburger Helper
* hh, hands high
* HH, brassiere cup size
* Handheld device
* Harry Harrison
* Hansestadt Hamburg, Hanseatic City
* Happy Hardcore
* Happy hour
* Harris hawk hh is a falconer's abbreviation
* Hart House, an historic building at the University of Toronto
* Hatboro-Horsham High School, South Eastern PA
* Hawthorne Heights (band)
* Hedgehog signaling pathway, and the hedgehog protein
* "Heil Hitler", the Hitler salute, an abbreviation often used by neo-nazis.
* Heinrich Himmler, Reichsfuhrer of the German Schutzstaffel SS
* Helly Hansen, HH is a Norwegian extreme foul weather clothing and textile maker
* Hereditary Hemochromatosis
* Herbie Hancock
* Herbig-Haro object, astronomy
* H.H., a webcomic by Daniel Kim
* H.H. Holmes, serial killer Herman Webster Mudgett
* His Highness, or Her Highness
* His Holiness, or Her Holiness
* Hodgkin-Huxley model
* Hogs Head
* Hollywood Hijinx
* Honor Harrington
* Households, demographic studies
* Howard Hughes
* Hubert Humphrey
* Hulk Hogan
* Hip-Hop
* Hank Hill, main character of King of the Hill
* Hubbard-Hall, Inc. a chemical distribution company