Johnson County
Johnson county is located in south Illinois. Johnson county has 343.91 square miles of land area and 4.95 square miles of water area. As of 2010, the total Johnson county population is 12,582, which has shrunk 2.30% since 2000. The population growth rate is much lower than the state average rate of 3.31% and is much lower than the national average rate of 9.71%. Johnson county median household income is $41,619 in 2006-2010 and has grown by 24.88% since 2000. The income growth rate is much higher than the state average rate of 13.70% and is higher than the national average rate of 19.17%. Johnson county median house value is $94,700 in 2006-2010 and has grown by 46.37% since 2000. The house value growth rate is about the same as the state average rate of 46.64% and is lower than the national average rate of 50.42%. 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 Johnson county is close to the state average in quality. The Johnson county area code is 618.
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