Silesia is a historical region in Central Europe.
Historical territories of Silesia include:
- Silesia, split between Poland, Czech Republic and Germany
- Lower Silesia, split between Poland and Germany
- Upper Silesia, split between Poland and the Czech Republic
- Czech Silesia (sometimes Moravian Silesia), in the Czech Republic
- Austrian Silesia, in the former Austrian Empire and Kingdom of Bohemia
- Cieszyn Silesia or Těšín Silesia, split between Poland and the Czech Republic
- Middle Silesia, in Poland
Administrative units of Silesia include:
- Duchy of Silesia (1138–1335)
- New Silesia, former Prussian province (1795–1807)
- Province of Silesia, former Prussian province (1815–1919; 1938–1941)
- Province of Lower Silesia, former Prussian province (1919–1938; 1941–1945)
- Province of Upper Silesia, former Prussian province (1919–1938; 1941–1945)
- Duchy of Upper and Lower Silesia (Austrian Silesia), former Austrian kronland (1742–1919)
- Silesian Voivodeship (1920–1939) in Second Polish Republic
- Silesian Voivodeship (1945–1950) in People's Republic of Poland
- Lower Silesian Upper Lusatia, former Saxon district (1994–2008)
- Lower Silesian Voivodeship, in Poland (1999–)
- Silesian Voivodeship, in Poland (1999–)
- Opole Voivodeship, in Poland (1999–)
- Lubusz Voivodeship, in Poland (1999–)
- Moravian-Silesian Region, in the Czech Republic (2000–)