Mascoutah, IL is a city located in Saint Clair County, Illinois and has a land area of 75.38 square miles (195.23 km2). The water area for the city is 0.94 square miles or 2.43 km2. There is one unique zip code in Mascoutah, Illinois and it is 62258. The area code(s) for Mascoutah is 618.
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