It is named for two prominent summits which rise to the south of the village, North Twin Mountain (4,761 ft or 1,451 m) and South Twin Mountain (4,902 ft or 1,494 m).

[2] The village is located at the junction of U.S. highways 3 and 302, two major routes through the White Mountain notches.

Twin Mountain has a separate ZIP code (03595) from the rest of the town of Carroll.

Twin Mountain Airport lies 1 mile (1.6 km) southwest of the Route 3 / 302 junction.

Its FAA identifier is 8B2, and its height above sea level is 1,459 feet (445 m).