Roslyn, SD -- U.S. town in South Dakota Population (2000): 225 Housing Units (2000): 109 Land area (2000): 0.199388 sq. miles (0.516413 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.199388 sq. miles (0.516413 sq. km) FIPS code: 56380 Located within: South Dakota (SD), FIPS 46 Location: 45.496323 N, 97.490960 W ZIP Codes (1990): 57261 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Roslyn, SD Roslyn