About This Place
Caseyville is a village in St. Clair County, Illinois, United States. The population was 4,310 at the 2000 census.
Caseyville is located at 38°37′59″N 90°1′58″W / 38.63306°N 90.03278°W / 38.63306; -90.03278 (38.633176, -90.032785).
According to the United States Census Bureau, the village has a total area of 6.2 square miles (16.1 km²), all of it land.