Herndon is located in northeast Virginia. Herndon is part of Fairfax County. Herndon has 4.27 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Herndon population is 24,141, which has grown 11.48% since 2000. The population growth rate is lower than the state average rate of 15.63% and is about the same as the national average rate of 11.61%. Herndon median household income is $100,399 in 2010-2014 and has grown by 37.70% since 2000. The income growth rate is about the same as the state average rate of 38.81% and is higher than the national average rate of 27.36%. Herndon median house value is $382,600 in 2010-2014 and has grown by 106.59% since 2000. The house value growth rate is higher than the state average rate of 94.18% and is much 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 Herndon is much better than the state average in quality. The Herndon area codes are 571, 703.