Williamson county is located close to the center of Texas. Williamson county has 1,118.30 square miles of land area and 16.14 square miles of water area. As of 2010-2014, the total Williamson county population is 457,218, which has grown 82.91% since 2000. The population growth rate is much higher than the state average rate of 25.13% and is much higher than the national average rate of 11.61%. Williamson county median household income is $72,118 in 2010-2014 and has grown by 18.92% since 2000. The income growth rate is much lower than the state average rate of 31.68% and is lower than the national average rate of 27.36%. Williamson county median house value is $185,700 in 2010-2014 and has grown by 47.62% since 2000. The house value growth rate is lower than the state average rate of 59.27% and is about the same as 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 Williamson county is better than the state average in quality. The Williamson county area codes are 254, 512.
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