Williamson is located in southwest West Virginia. Williamson is part of Mingo County. Williamson has 3.26 square miles of land area and has no water area. As of 2010-2014, the total Williamson population is 3,118, which has shrunk 8.67% since 2000. The population growth rate is much lower than the state average rate of 2.52% and is much lower than the national average rate of 11.61%. Williamson median household income is $36,536 in 2010-2014 and has grown by 86.08% since 2000. The income growth rate is much higher than the state average rate of 40.01% and is much higher than the national average rate of 27.36%. Williamson median house value is $87,900 in 2010-2014 and has grown by 40.64% since 2000. The house value growth rate is higher than the state average rate of 37.64% 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 Williamson is worse than the state average in quality. The Williamson area code is 304.