Roslyn Map
Roslyn is a town in Day County, South Dakota, United States. The population was 183 at the 2010 census.
Roslyn is located at 45°29?47?N 97°29?27?W / 45.49639°N 97.49083°W / 45.49639; -97.49083 (45.496323, -97.490960).
According to the United States Census Bureau, the town has a total area of 0.2 square miles (0.5 km²), all of it land.
Nearby cities include Webster, Waubay, Bristol, Pierpont, Langford.