Onaka is located close to the center of South Dakota. Onaka is between the Faulk, Edmunds, Potter county. Onaka has 0.26 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Onaka population is 14, which has shrunk 53.33% 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%. Onaka median household income is $14,688 in 2010-2014 and has has shrunk by 52.04% 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%. Onaka median house value is $19,400 in 2010-2014 and has shrunk by -94.02% since 2000. The house value growth rate is 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 Onaka is much better than the state average in quality. The Onaka area code is 605.