Caseyville, IL is a city located in Saint Clair County, Illinois and has a land area of 12.83 square miles (33.23 km2). The water area for the city is 0.10 square miles or 0.26 km2. There is one unique zip code in Caseyville, Illinois and it is 62232. The area code(s) for Caseyville is 618.
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