About This Place
Dallas is a town in Gregory County, South Dakota, United States. The population was 120 at the 2010 census.
Dallas is located at 43°14′13″N 99°31′0″W / 43.23694°N 99.516667°W / 43.23694; -99.516667 (43.236820, -99.516582).
According to the United States Census Bureau, the town has a total area of 0.5 square miles (1.3 km²), all of it land.