Alorton was a village in St. Clair County, Illinois, United States. Incorporated in 1944, it was one of three municipalities that merged to form the city of Cahokia Heights on May 6, 2021; the other two were the village of Cahokia and the city of Centreville. Prior to merger, Alorton had a population of 1,566 and land area of 1.8 square miles (4.7 km2) in the 2020 Census.