Cambodia (; ,
Kampuchea, ), officially known as the
Kingdom of Cambodia (, Preah Réachéanachâk Kâmpuchéa, ) and once known as the
Khmer Empire, is a country located in the southern portion of the
Indochina Peninsula in
Southeast Asia. Its total landmass is , bordered by
Thailand to the northwest,
Laos to the northeast,
Vietnam to the east, and the
Gulf of Thailand to the southwest.