Northfield is located in northeast Illinois. Northfield is part of Cook County. Northfield has 3.21 square miles of land area and has no water area. As of 2010-2014, the total Northfield population is 5,332, which has shrunk 1.06% since 2000. The population growth rate is lower than the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Northfield median household income is $102,424 in 2010-2014 and has grown by 12.17% since 2000. The income growth rate is much lower than the state average rate of 22.70% and is much lower than the national average rate of 27.36%. Northfield median house value is $648,900 in 2010-2014 and has grown by 57.81% since 2000. The house value growth rate is much higher than the state average rate of 34.33% 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 Northfield is much better than the state average in quality.