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 2010-2014, the total Johnson county population is 12,650, which has shrunk 1.77% 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%. Johnson county median household income is $41,414 in 2010-2014 and has grown by 24.27% since 2000. The income growth rate is higher than the state average rate of 22.70% and is lower than the national average rate of 27.36%. Johnson county median house value is $88,700 in 2010-2014 and has grown by 37.09% since 2000. The house value growth rate is higher than the state average rate of 34.33% 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 Johnson county is close to the state average in quality. The Johnson county area code is 618.
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