Erwin is located in east South Dakota. Erwin is between the Kingsbury, Hamlin county. Erwin has 0.48 square miles of land area and has no water area. As of 2010-2014, the total Erwin population is 60, which has grown 3.45% 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%. Erwin median household income is $17,188 in 2010-2014 and has has shrunk by 48.11% since 2000. The income growth rate is much lower than the state average rate of 42.67% and is much lower than the national average rate of 27.36%. Erwin median house value is $35,000 in 2010-2014 and has shrunk by -127.27% 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 Erwin is much better than the state average in quality. The Erwin area code is 605.