Koh or KOH may refer to:
Chemistry Potassium hydroxide, formula "KOH" KOH test, a procedure in which potassium hydroxide is used to dissolve skin and reveal fungal cells under the microscope
People Koh (surname), a surname with various origins, including: Xǔ (surname), a Chinese surname sometimes spelled as Koh based on its pronunciation in Southern Min dialects Ko (Korean surname), occasionally spelled as Koh
People with the given name Koh include: Koh Gabriel Kameda (born 1975), German-Japanese concert violinist and violin teacher Koh Kojima or Kō Kojima (born 1928), Japanese manga artist Koh Masaki or Kō Masaki (1983–2013), Japanese gay pornographic film actor Koh Traoré (born 1989), Burkinabé born Ivorian football player Koh Yasuda (1907–1943), Japanese ophthalmologist, first director of Amami Wakoen Sanatorium, a leprosy sanatorium in Japan
Places ( ), a Thai word meaning 'island', found in names of islands of Thailand (), a Thai meaning 'island', found in names of islands of Thailand (), a Dari word meaning 'mountain', found in names of mountains of Afghanistan (), an Urdu loanword from Persian meaning 'mountain', found in names of mountains of Pakistan
Other Koh the Face Stealer, a character in Avatar: The Last Airbender King of the Hammers, an off-road race in Johnson Valley, California, United States
See also
Koh-i-Noor, a diamond Kou (disambiguation) (which might be confused due to similar pronunciation) KKOH, a radio station in Reno, Nevada, US