About This Place
Clayton is a village in Adams County, Illinois, United States. The population was 904 at the 2000 census. It is part of the Quincy, IL–MO Micropolitan Statistical Area.
Clayton is located at 40°01′45″N 90°57′29″W / 40.02922°N 90.958122°W / 40.02922; -90.958122.
According to the United States Census Bureau, the village has a total area of 0.9 square miles (2.3 km²), all of it land.