Mapleton is a small village in Peoria County, Illinois, United States.

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 (and the wider Peoria area's) most significant employers and a good source of skilled employees and good jobs.

[2] According to the 2010 census, Mapleton has a total area of 0.91 square miles (2.36 km2), all land.

The racial makeup of the village was 96.92% White, 1.32% Native American, and 1.76% from two or more races.