Bethalto is located in southwest Illinois. Bethalto is part of Madison County. Bethalto has 7.52 square miles of land area and 0.08 square miles of water area. As of 2010-2014, the total Bethalto population is 9,443, which has shrunk 0.12% 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%. Bethalto median household income is $60,236 in 2010-2014 and has grown by 42.74% 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%. Bethalto median house value is $127,500 in 2010-2014 and has grown by 61.60% 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 Bethalto is close to the state average in quality. The Bethalto area code is 618.