Twin Mountain is a village within the town of Carroll in the White Mountains of New Hampshire. It is named for two prominent summits which rise to the south of the village, North Twin Mountain and South Twin Mountain (4,902 ft/1,494 m). The village is located at the junction of U.S. highways 3 and 302, two major routes through the White Mountain notches. The Ammonoosuc River flows through the center of the village.