Mapleton is a small village in Peoria County, Illinois, United States. The population was 227 at the 2000 census. Mapleton is part of the Peoria, Illinois Metropolitan Statistical Area. There are four different plants in Mapleton, all located along U.S. Route 24: an Evonik chemical plant, a Lonza Group plant, a Caterpillar Inc. foundry, and an Ingredion facility; together, the large industrial complex forms one of Mapleton's most significant employers and a good source of skilled employees and good jobs.Mapleton is located at 40°34′22″N 89°43′42″W / 40.572758°N 89.728249°W / 40.572758; -89.728249.According to the 2010 census, Mapleton has a total area of 0.91 square miles, all land.As of the census of 2000, there were 227 people, 100 households, and 57 families residing in the village. The population density was 316.1 people per square mile. There were 111 housing units at an average density of 154.6 per square mile. The racial makeup of the village was 96.92% White, 1.