Illinois Route 336 is a four-lane freeway/expressway combination that serves western Illinois. It is also used by the Illinois Department of Transportation (IDOT) as a part of Federal-Aid Primary Highway 315 (FAP315) to refer to a future project connecting the cities of Quincy and Peoria via underserved Macomb.

Mendon is a village in Adams County, Illinois, United States. The population was 872 at the 2020 census. It is part of the Quincy, IL–MO Micropolitan Statistical Area.