Khmer stands for several things related to Cambodia:
- The Khmer people, the ethnic group to which the great majority of Cambodians belong to
- The Cambodian language
- The Khmer Empire, which ruled over much of Indochina from the 9th to the 13th centuries. (See also: Angkor)
- The Khmer Rouge, a Cambodian Communist political group and guerilla movement.
- The Khmer alphabet
- Khmer Republic, the name of Cambodia from 1975 to 1980