SloveniaSlovenia (sloʊˈviːniə,_slə- ; Slovenija slɔˈʋèːnija), officially the Republic of Slovenia (Slovene: , abbr.: RS), is a country in southern Central Europe. Spread over 20,271 km2, it is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the southeast, and the Adriatic Sea to the southwest. Slovenia is mostly mountainous and forested, covers , and has a population of 2.1 million (2,110,547 people). Slovenes constitute over 80% of the country's population.