South Tyrol (German: Südtirol [ˈzyːtːiˌʁoːl] , locally [ˈsyːtiˌroːl]; Italian: Alto Adige [ˈalto ˈaːdidʒe]; Ladin: Südtirol), officially the Autonomous Province of Bolzano – South Tyrol, is an autonomous province in northern Italy. Together with Trentino, South Tyrol forms the autonomous region of Trentino-Alto Adige/Südtirol. The province is Italy's northernmost and the second-largest, with an area of 7,400 square kilometres (2,857 sq mi), and has a population of about 534,000 as of 2021. Its capital and largest city is Bolzano.

South Tyrol has a considerable level of self-government, consisting of a large range of exclusive legislative and executive powers and a fiscal regime that allows it to retain 90% of revenue, while remaining a net contributor to the national budget. As of 2023, it is Italy's wealthiest province and among the wealthiest in the European Union.