Inner Carniola in the context of "Lower Carniolan dialect group"

The Slovene Littoral, or simply Littoral (Slovene: Primorska, pronounced [pɾiˈmóːɾska] ; Italian: Litorale; German: Küstenland), is one of the traditional regions of Slovenia. The littoral in its name – for a coastal-adjacent area – recalls the former Austrian Littoral (Avstrijsko Primorje), the Habsburg possessions on the upper Adriatic coast, of which the Slovene Littoral was part. Today, the Littoral is often associated with the Slovenian ethnic territory that, in the first half of the 20th century, found itself in Italy to the west of the Rapallo Border, which separated a quarter of Slovenes from the rest of the nation, and was strongly influenced by Italian fascism.

Prekmurje (Slovene pronunciation: [pɾɛkˈmúːɾjɛ] also [ˈpɾeːkmuɾjɛ] ; Prekmurje Slovene: Prèkmürsko or Prèkmüre; Hungarian: Muravidék) is a geographically, linguistically, culturally, and ethnically defined region of Slovenia, settled by Slovenes and a Hungarian minority, lying between the Mur River in Slovenia and the Rába Valley (the watershed of the Rába; Slovene: Porabje) in the westernmost part of Hungary. It covers an area of 938 square kilometers (362 sq mi) and has a population of 78,000 people. Its largest town and urban center is Murska Sobota, the other urban center being Lendava.

Styria (Slovene: Štajerska [ˈʃtáːjɛɾska]), also known as Slovenian Styria (Slovene: Slovenska Štajerska; Austrian German: Slowenische Steiermark) or Lower Styria (Slovene: Spodnja Štajerska; Austrian German: Untersteiermark) to differentiate it from Austrian Styria, is a traditional region in northeastern Slovenia, comprising the southern third of the former Duchy of Styria. The population of Styria in its historical boundaries amounts to around 705,000 inhabitants, or 34.5% of the population of Slovenia. Its largest city and urban center is Maribor, with other urban centers including Celje, Velenje, Ptuj and Trbovlje.

Carniola (Slovene: Kranjska [ˈkɾàːnska]; German: Krain [kʁaɪn] ; Italian: Carniola; Hungarian: Krajna) is a historical region that comprised parts of present-day Slovenia. Slovenes living within the former borders of the region still tend to identify with its traditional parts Upper Carniola, Lower Carniola (with the sub-part of White Carniola), and to a lesser degree with Inner Carniola. In 1991, 47% of the population of Slovenia lived within the borders of the former Duchy of Carniola.

Upper Carniola (Slovene: Gorenjska pronounced [ɡɔˈɾèːnska]; Italian: Alta Carniola; German: Oberkrain) is a traditional region of Slovenia, the northern mountainous part of the larger Carniola region. The largest town in the region is Kranj, and other urban centers include Kamnik, Jesenice, Domžale and Škofja Loka. It has around 300,000 inhabitants or 14% of the population of Slovenia.

Lower Carniola (Slovene: Dolenjska pronounced [dɔˈlèːnska]; German: Unterkrain) is a traditional region in Slovenia, the southeastern part of the historical Carniola region. Its largest town and urban center is Novo Mesto, with other urban centers including Kočevje, Grosuplje, Krško, Trebnje, and Ribnica.

Carinthia (Slovene: Koroška [kɔˈɾóːʃka] ; German: Kärnten), also Slovene Carinthia or Slovenian Carinthia (Slovenska Koroška), 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. Towns that make urban centers include Ravne, Prevalje, Mežica and Dravograd.

Since the entry of Slovenia into the European Union in May 2004, much effort has been made to re-integrate Carinthia as a cultural, tourism, and economic unit. The historical region has no official status within Slovenia and does not territorially correspond to today's Carinthia Statistical Region, but popular identification with Carinthia as an informal province remains common.