Hilliard is located close to the center of Ohio. Hilliard is part of Franklin County. Hilliard has 13.17 square miles of land area and 0.17 square miles of water area. As of 2010-2014, the total Hilliard population is 30,815, which has grown 27.18% since 2000. The population growth rate is much higher than the state average rate of 1.83% and is much higher than the national average rate of 11.61%. Hilliard median household income is $88,203 in 2010-2014 and has grown by 27.80% since 2000. The income growth rate is higher than the state average rate of 19.27% and is about the same as the national average rate of 27.36%. Hilliard median house value is $207,100 in 2010-2014 and has grown by 31.41% since 2000. The house value growth rate is higher than the state average rate of 24.98% 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 Hilliard is better than the state average in quality. The Hilliard area code is 614.