Oacoma is located close to the center of South Dakota. Oacoma is part of Lyman County. Oacoma has 2.59 square miles of land area and 1.59 square miles of water area. As of 2010-2014, the total Oacoma population is 483, which has grown 23.85% since 2000. The population growth rate is much higher than the state average rate of 10.58% and is much higher than the national average rate of 11.61%. Oacoma median household income is $46,667 in 2010-2014 and has grown by 27.09% since 2000. The income growth rate is much lower than the state average rate of 42.67% and is about the same as the national average rate of 27.36%. Oacoma median house value is $94,100 in 2010-2014 and has grown by 34.43% since 2000. The house value growth rate is much lower than the state average rate of 70.48% and is lower 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 Oacoma is much better than the state average in quality. The Oacoma area code is 605.