Fairfield is located in south Illinois. Fairfield is part of Wayne County. Fairfield has 4.02 square miles of land area and 0.03 square miles of water area. As of 2010-2014, the total Fairfield population is 5,080, which has shrunk 6.29% since 2000. The population growth rate is much lower than the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Fairfield median household income is $34,824 in 2010-2014 and has grown by 34.99% since 2000. The income growth rate is much higher than the state average rate of 22.70% and is higher than the national average rate of 27.36%. Fairfield median house value is $63,200 in 2010-2014 and has grown by 36.50% 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 Fairfield is close to the state average in quality. The Fairfield area code is 618.