Clay county is located in northwest Iowa. Clay county has 567.24 square miles of land area and 5.35 square miles of water area. As of 2010-2014, the total Clay county population is 16,555, which has shrunk 4.70% since 2000. The population growth rate is much lower than the state average rate of 5.19% and is much lower than the national average rate of 11.61%. Clay county median household income is $49,438 in 2010-2014 and has grown by 38.10% since 2000. The income growth rate is higher than the state average rate of 33.56% and is higher than the national average rate of 27.36%. Clay county median house value is $106,400 in 2010-2014 and has grown by 43.01% since 2000. The house value growth rate is lower than the state average rate of 53.09% 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 Clay county is much better than the state average in quality. The Clay county area code is 712.
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