Frankfort is located in northeast Illinois. Frankfort is between the Will, Cook county. Frankfort has 14.98 square miles of land area and has no water area. As of 2010-2014, the total Frankfort population is 18,100, which has grown 74.19% since 2000. The population growth rate is much higher than the state average rate of 3.62% and is much higher than the national average rate of 11.61%. Frankfort median household income is $110,829 in 2010-2014 and has grown by 33.44% since 2000. The income growth rate is higher than the state average rate of 22.70% and is higher than the national average rate of 27.36%. Frankfort median house value is $348,600 in 2010-2014 and has grown by 41.76% since 2000. The house value growth rate is higher than the state average rate of 34.33% 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 Frankfort is much better than the state average in quality. The Frankfort area code is 815.