Grayslake, IL is a city located in Lake County, Illinois and has a land area of 26.76 square miles (69.31 km2). The water area for the city is 1.34 square miles or 3.47 km2. There is one unique zip code in Grayslake, Illinois and it is 60030. The area code(s) for Grayslake is 847/224.
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