Clay county is located in south Illinois. Clay county has 468.32 square miles of land area and 1.28 square miles of water area. As of 2010-2014, the total Clay county population is 13,675, which has shrunk 6.08% since 2000. The population growth rate is much lower than the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Clay county median household income is $43,189 in 2010-2014 and has grown by 41.15% since 2000. The income growth rate is much higher than the state average rate of 22.70% and is much higher than the national average rate of 27.36%. Clay county median house value is $76,000 in 2010-2014 and has grown by 47.57% since 2000. The house value growth rate is higher than the state average rate of 34.33% and is about the same as 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 close to the state average in quality. The Clay county area code is 618.
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