Energy is located in south Illinois. Energy is part of Williamson County. Energy has 1.18 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Energy population is 1,039, which has shrunk 11.57% 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%. Energy median household income is $41,154 in 2010-2014 and has grown by 43.14% since 2000. The income growth rate is much higher than the state average rate of 22.70% and is much higher than the national average rate of 27.36%. Energy median house value is $110,900 in 2010-2014 and has grown by 53.39% 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 Energy is close to the state average in quality. The Energy area code is 618.