Williamsville is located in west New York. Williamsville is part of Erie County. Williamsville has 1.26 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Williamsville population is 5,286, which has shrunk 5.15% since 2000. The population growth rate is much lower than the state average rate of 3.26% and is much lower than the national average rate of 11.61%. Williamsville median household income is $60,700 in 2010-2014 and has grown by 27.64% since 2000. The income growth rate is lower than the state average rate of 35.25% and is about the same as the national average rate of 27.36%. Williamsville median house value is $162,900 in 2010-2014 and has grown by 59.71% since 2000. The house value growth rate is much lower than the state average rate of 90.79% and is higher 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 Williamsville is much better than the state average in quality.