Lake county is located in east South Dakota. Lake county has 563.28 square miles of land area and 11.88 square miles of water area. As of 2010-2014, the total Lake county population is 11,831, which has grown 4.92% 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%. Lake county median household income is $50,378 in 2010-2014 and has grown by 47.79% since 2000. The income growth rate is higher than the state average rate of 42.67% and is much higher than the national average rate of 27.36%. Lake county median house value is $121,800 in 2010-2014 and has grown by 65.04% since 2000. The house value growth rate is lower than the state average rate of 70.48% and is 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 Lake county is much better than the state average in quality. The Lake county area code is 605.
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