Administratively, the summit is shared by the municipalities of Brienz, to the south and east, Oberried am Brienzersee, to the west, and Flühli, to the north-east. Brienz and Oberried am Brienzersee are in the canton of Bern, whilst Flühli is in the canton of Lucerne. The Tannhorn is the southernmost point in the canton of Lucerne.