Dunning Mountain is a stratigraphic ridge in central Pennsylvania, United States.

The mountain's north end is at McKee Gap, which separates it from Short Mountain, and where Halter Creek flows westward towards the Frankstown Branch of the Juniata River.

The town of Roaring Spring is located at the north end of the mountain on the east side.

Route 869 crosses southern Dunning Mountain from Imler to Brumbaugh, and Route 1042 (Sproul Mountain Road) crosses it east of Sproul.

The erosion-resistant Silurian Tuscarora Formation, a quartzite, outcrops along the crest of the ridge.