Cahokia is located in southwest Illinois. Cahokia is part of Saint Clair County. Cahokia has 9.40 square miles of land area and 0.50 square miles of water area. As of 2010-2014, the total Cahokia population is 14,905, which has shrunk 9.07% 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%. Cahokia median household income is $30,394 in 2010-2014 and has has shrunk by 1.96% 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%. Cahokia median house value is $53,900 in 2010-2014 and has shrunk by -36.46% 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 Cahokia is worse than the state average in quality.