Summerfield, IL is a city located in Saint Clair County, Illinois and has a land area of 1.50 square miles (3.88 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Summerfield, Illinois and it is 62289. The area code(s) for Summerfield is 618.
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