Before 2017, the municipality was located in the Oberengadin sub-district of the Maloja district in the central Oberengadin valley along the Inn river. After 2017 it was part of the Maloja Region. It consists of the village of Samedan and the hamlet of Punt Muragl, the upper section of the Val Bever as well as an exclave that includes nearly the entire Val Roseg, a valley surrounded by the highest mountains of the canton: Piz Bernina, Piz Scerscen and Piz Roseg. Until 1943 Samedan was known as Samaden.