Slovene Lands or Slovenian Lands (Slovene: Slovenske dežele or in short Slovensko) is the historical denomination for the territories in Central and Southern Europe where people primarily spoke Slovene. The Slovene Lands were part of the Illyrian provinces, the Austrian Empire and Austria-Hungary (in Cisleithania). They encompassed Carniola, southern part of Carinthia, southern part of Styria, Istria, Gorizia and Gradisca, Trieste, and Prekmurje. Their territory more or less corresponds to modern Slovenia and the adjacent territories in Italy, Austria, Hungary, and Croatia, where autochthonous Slovene minorities live. In the areas where present-day Slovenia borders to neighboring countries, they were never homogeneously ethnically Slovene.
Like the Slovaks, the Slovenes preserve the self-designation of the early Slavs as their ethnonym. The term Slovenia ("Slovenija") was not in use prior to the early 19th century, when it was coined for political purposes by the Slovene romantic nationalists, most probably by some pupils of the linguist Jernej Kopitar. It started to be used only from the 1840s on, when the quest for a politically autonomous United Slovenia within the Austrian Empire was first advanced during the Spring of Nations. "Slovenia" became a de facto distinctive administrative and political entity for the first time in 1918, with the unilateral declaration of the State of Slovenes, Croats and Serbs, that Slovenia.