St. Martin in Passeier is a comune and village situated in the Passeier Valley within the province of Bolzano. It is located in the South Tyrol region of northern Italy, approximately 35 kilometres (22 mi) northwest of the city of Bolzano.
The municipality serves as a local settlement in the alpine landscape of the region. It is characterized by its position within the valley and its proximity to major regional hubs like Bolzano.