Johnson county is located close to the center of Texas. Johnson county has 724.69 square miles of land area and 9.77 square miles of water area. As of 2010-2014, the total Johnson county population is 153,854, which has grown 21.33% since 2000. The population growth rate is lower than the state average rate of 25.13% and is much higher than the national average rate of 11.61%. Johnson county median household income is $58,221 in 2010-2014 and has grown by 30.48% since 2000. The income growth rate is about the same as the state average rate of 31.68% and is higher than the national average rate of 27.36%. Johnson county median house value is $114,100 in 2010-2014 and has grown by 39.32% since 2000. The house value growth rate is much lower than the state average rate of 59.27% 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 codes are 469, 682, 817, 972.
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