Sherman is located close to the center of Illinois. Sherman is part of Sangamon County. Sherman has 3.19 square miles of land area and 0.05 square miles of water area. As of 2010-2014, the total Sherman population is 4,016, which has grown 39.88% 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%. Sherman median household income is $85,769 in 2010-2014 and has grown by 20.14% since 2000. The income growth rate is lower than the state average rate of 22.70% and is lower than the national average rate of 27.36%. Sherman median house value is $195,100 in 2010-2014 and has grown by 52.90% 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 Sherman is much better than the state average in quality. The Sherman area code is 217.