Carinthia, also Slovene Carinthia or Slovenian Carinthia, is a traditional region in northern Slovenia. The term refers to the small southeasternmost area of the former Duchy of Carinthia, which after World War I was allocated to the State of Slovenes, Croats and Serbs according to the 1919 Treaty of Saint-Germain. It has no distinct centre, but a local centre in each of the three central river valleys among the heavily forested mountains.

The Duchy of Carinthia was a duchy located in southern Austria and parts of northern Slovenia. It was separated from the Duchy of Bavaria in 976, and was the first newly created Imperial State after the original German stem duchies.