Polk county is located in west Arkansas. Polk county has 857.68 square miles of land area and 4.78 square miles of water area. As of 2010, the total Polk county population is 20,662, which has grown 2.14% since 2000. The population growth rate is much lower than the state average rate of 9.07% and is much lower than the national average rate of 9.71%. Polk county median household income is $32,525 in 2006-2010 and has grown by 29.17% since 2000. The income growth rate is much higher than the state average rate of 19.03% and is much higher than the national average rate of 19.17%. Polk county median house value is $79,300 in 2006-2010 and has grown by 38.88% since 2000. The house value growth rate is lower than the state average rate of 46.02% 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 Polk county is better than the state average in quality. The Polk county area codes are 479, 870.
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