KH

KH is a combination that may mean several things:
* Cambodia (Kampuchea, Kampocha, Kamboja) — ISO 3166-2 alpha code
* "Kingdom Hearts" — a Disney and Square Enix video game series
** "Kingdom Hearts" — the first game in the series
* Keri Hilson, an American singer and songwriter
* Khornerstone — a computer benchmark
* Kh (digraph) — in English transliteration from numerous foreign languages, usually represents a Voiceless velar fricative (IPA2|x), but sometimes a voiceless aspirated velar plosive (stop, tenue) (IPA2|kʰ)
* KH (hardness) — a measure of the hardness of water (calcium carbonate concentration)
* Kelvin-Helmholtz instability — a phenomenon of fluid mechanics
* Kh factor - a constant used in electrical metering which corresponds to the number of watt-hours used per revolution of the meter disc
* Kill Hannah - A Chicago-based alternative rock band
* Kris Holm - A unicyclist
* Kirk Hammet - Lead guitarist in the metal band Metallica
* Potassium hydride
* Key Hole (KH) series of imaging satellites used by various United States agencies. See Spy satellite, United States
* A knight of the Royal Guelphic Order (KH)