Byelorussia
Byelorussia may refer to:
- historical 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
- 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