About This Place
Hermosa is a town in Custer County, South Dakota, United States. The population was 398 at the 2010 census.
Hermosa is located at 43°50′20″N 103°11′38″W / 43.83889°N 103.19389°W / 43.83889; -103.19389 (43.838786, -103.193978).
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.0 km²), all of it land.