Byelorussia may refer to:
Historical (Soviet) name for Belarus, a country in Eastern Europe Socialist Soviet Republic of Byelorussia or Soviet Socialist Republic of Belarus, an early client state of Soviet Russia in the historical territory of Belarus Socialist Soviet Republic of Lithuania and Byelorussia or Socialist Soviet Republic of Lithuania and Belarus Byelorussian Soviet Socialist Republic, a nominally independent state in 1920–1922 and constituent republic of the Soviet Union from 1922 to 1991 2170 Byelorussia, a main-belt asteroid
See also Belarus (disambiguation) Republic of Belarus (disambiguation)