博尔扎诺自治省（意大利语：Provincia autonoma di Bolzano；德语：Autonome Provinz Bozen；**：Provinzia autonòma de Balsan），又称上阿迪杰（Alto Adige）或南蒂罗尔（Südtirol 或 South Tyrol），是意大利特伦蒂诺-上阿迪杰的一个省。面积7,400平方公里，2005年人口487,673人。首府博尔扎诺。

此自治省的主体民族是日耳曼族，通行德语。

下分116市镇。

South Tyrol (German and Ladin:Südtirol [ˈsyːtiˌroːl, ˈzyːttiˌʁoːl]; Italian:Sudtirolo [suttiˈrɔːlo]), also known by its alternative Italian name Alto Adige (pronounced [ˈalto ˈaːdidʒe]), is an autonomous province in northern Italy. It is one of the two autonomous provinces that make up the autonomous region of Trentino-Alto Adige/Südtirol. The province has an area of 7,400 square kilometres (2,857 sq mi) and a total population of 511,750 inhabitants (31.12.2011). Its capital is the city of Bolzano (German: Bozen; Ladin: Balsan or Bulsan).