Roslyn is located in northeast South Dakota. Roslyn is between the Day, Marshall county. Roslyn has 0.20 square miles of land area and has no water area. As of 2010-2014, the total Roslyn population is 193, which has shrunk 14.22% since 2000. The population growth rate is much lower than the state average rate of 10.58% and is much lower than the national average rate of 11.61%. Roslyn median household income is $26,111 in 2010-2014 and has grown by 34.77% since 2000. The income growth rate is lower than the state average rate of 42.67% and is higher than the national average rate of 27.36%. Roslyn median house value is $44,200 in 2010-2014 and has grown by 176.25% since 2000. The house value growth rate is much higher than the state average rate of 70.48% and is much higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Roslyn is much better than the state average in quality. The Roslyn area code is 605.