Williamstown is located in northeast Kentucky. Williamstown is part of Grant County. Williamstown has 16.43 square miles of land area and 0.53 square miles of water area. As of 2010-2014, the total Williamstown population is 3,932, which has grown 21.85% since 2000. The population growth rate is much higher than the state average rate of 8.45% and is much higher than the national average rate of 11.61%. Williamstown median household income is $44,028 in 2010-2014 and has grown by 30.45% since 2000. The income growth rate is higher than the state average rate of 28.72% and is higher than the national average rate of 27.36%. Williamstown median house value is $130,600 in 2010-2014 and has grown by 47.57% since 2000. The house value growth rate is higher than the state average rate of 40.25% 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 Williamstown is better than the state average in quality. The Williamstown area code is 859.