Farmington is a city in Fulton County & Peoria County, Illinois, United States. It is north of Canton, west of Peoria, southeast of Galesburg, and northeast of Macomb. The population was 2,389 at the 2020 census. The public school system is Farmington Central Community Unit School District 265, which includes Farmington Central High School. Because it is in Fulton County & Peoria County, it is a part of the Canton Micropolitan Area and the wider Peoria Consolidated Statistical Area.

Fulton County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 33,609. Its county seat is Lewistown, and the largest city is Canton. Fulton County comprises the Canton, IL Micropolitan Statistical Area, which is part of the Peoria-Canton, IL Combined Statistical Area.