The Mongolian People's Republic was a socialist state that existed from 1924 to 1992, located in the historical region of Outer Mongolia under the Qing dynasty. It was officially recognized by the Nationalist government as independent from the Republic of China in 1946. Until 1990, it was a one-party state ruled by the Mongolian People's Revolutionary Party, and maintained close political and economic ties with the Soviet Union, as part of the Eastern Bloc.

Outer Mongolia was the name of a territory in the Manchu-led Qing dynasty of China from 1691 to 1911. It corresponds to the modern-day independent state of Mongolia and the Russian republic of Tuva. The historical region gained de facto independence from Qing China during the Xinhai Revolution.