This is a list of mountains of the canton of Appenzell Innerrhoden in Eastern Switzerland. The canton is located in the Appenzell Alps. The Säntis, which marks the tripoint with the cantons of Appenzell Ausserrhoden, and St. Gallen, is the most elevated and most prominent mountain of Appenzell Innerrhoden. The canton's highest summits are all located in the Alpstein massif.
All mountain heights and prominences on the list are from the largest-scale maps available.
This list only includes significant summits with a topographic prominence of at least .