Former states and territories in Slovenia

Istria ( ) is the largest peninsula within the Adriatic Sea. Located at the top of the Adriatic between the Gulf of Trieste and the Kvarner Gulf, the peninsula is shared by three countries: Croatia, Slovenia, and Italy, 90% of its area being part of Croatia. Most of Croatian Istria is part of Istria County.

former state of the Holy Roman Empire and one-time crown land of Austria-Hungary

province of the First French Empire

historical state, Habsburgian crown land

historical provinces of the House of Habsburg

short-lived republic in Central Europe between late-May and early-June 1919

Crown land of the empire of Austria

Province of the Kingdom of Yugoslavia

province (banovina) of the Kingdom of Yugoslavia (1929-1939)

medieval State in the Holy Roman Empire

Province in Italian-annexed Slovenia (1941–1943)

small mountain region in northeastern Italy

areas where the Slovene language is spoken

historical area in southern Europe