Sarntal (German: [ˈsarntaːl]; Italian: Sarentino [sarenˈtiːno]) is a valley and a comune (municipality) in South Tyrol in northern Italy, located about 15 kilometres (9 mi) north of the city of Bolzano . The municipality comprises several towns and villages. The largest one, seat of the mayor and council, is Sarnthein.

Sarntal borders the following municipalities: Hafling , Freienfeld, Klausen, Franzensfeste, Mölten , Ratschings , Ritten , Jenesien , St. Leonhard in Passeier, Schenna, Vahrn, Vöran and Villanders. The Durnholzer See is located in the municipal territory.