The history of Slovenia chronicles the period of the Slovenian territory from the 5th century BC to the present. In the Early Bronze Age, Proto-Illyrian tribes settled an area stretching from present-day Albania to the city of Trieste. The Slovenian territory was part of the Roman Empire, and it was devastated by the Migration Period's incursions during late Antiquity and the Early Middle Ages. The main route from the Pannonian plain to Italy ran through present-day Slovenia. Alpine Slavs, ancestors of modern-day Slovenians, settled the area in the late 6th Century AD. The Holy Roman Empire controlled the land for nearly 1,000 years, and between the mid-14th century and 1918 most of Slovenia was under Habsburg rule. In 1918, most Slovene territory became part of the Kingdom of Serbs, Croats, and Slovenes, and in 1929 the Drava Banovina was created within the Kingdom of Yugoslavia with its capital in Ljubljana, corresponding to Slovenian-majority territories within the state. The Socialist Republic of Slovenia was created in 1945 as part of federal Yugoslavia. Slovenia gained its independence from Yugoslavia in June 1991, and today it is a member of the European Union and NATO.

The Slovenes, also known as Slovenians, are a South Slavic ethnic group native to Slovenia, and adjacent regions in Italy, Austria and Hungary. Slovenes share a common ancestry, culture, history and speak Slovene as their native language. According to ethnic classification based on language, they are closely related to other South Slavic ethnic groups, as well as more distantly to West Slavs.