Union county is located in south Illinois. Union county has 413.46 square miles of land area and 8.69 square miles of water area. As of 2010, the total Union county population is 17,808, which has shrunk 2.65% 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%. Union county median household income is $39,760 in 2006-2010 and has grown by 28.28% 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%. Union county median house value is $84,200 in 2006-2010 and has grown by 40.57% since 2000. The house value growth rate is lower than 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 Union county is worse than the state average in quality. The Union county area code is 618.
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