Illiopolis is located close to the center of Illinois. Illiopolis is between the Sangamon, Logan, Macon county. Illiopolis has 0.46 square miles of land area and has no water area. As of 2010-2014, the total Illiopolis population is 913, which has shrunk 0.33% 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%. Illiopolis median household income is $52,667 in 2010-2014 and has grown by 13.40% 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%. Illiopolis median house value is $87,800 in 2010-2014 and has grown by 35.49% since 2000. The house value growth rate is about the same as 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 Illiopolis is better than the state average in quality. The Illiopolis area code is 217.