Rock Island County
Rock Island county is located in northwest Illinois. Rock Island county has 427.64 square miles of land area and 23.65 square miles of water area. As of 2010, the total Rock Island county population is 147,546, which has shrunk 1.22% since 2000. The population growth rate is lower than the state average rate of 3.31% and is much lower than the national average rate of 9.71%. Rock Island county median household income is $46,226 in 2006-2010 and has grown by 19.73% since 2000. The income growth rate is higher than the state average rate of 13.70% and is about the same as the national average rate of 19.17%. Rock Island county median house value is $111,700 in 2006-2010 and has grown by 41.57% 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 Rock Island county is worse than the state average in quality. The Rock Island county area code is 309.
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