The part of our planet referred to as Indochina is a geographical region of Southeast Asia. It occupies the easternmost region of the Indochinese Peninsula, on land located directly east of Thailand, and south of China.

It was originally comprised of the French colony of Cochin, China, and the French protectorates of Annam and Tonkin (later united with Cochin to form Vietnam); Cambodia (formerly Kampuchea), Laos and Vietnam.