Glendale Heights, IL is a city located in Dupage County, Illinois and has a land area of 5.53 square miles (14.32 km2). The water area for the city is 0.15 square miles or 0.39 km2. There is one unique zip code in Glendale Heights, Illinois and it is 60139. The area code(s) for Glendale Heights is 630/847/224/312.
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