Town guide
Crystal Lake
Illinois · IL
About Crystal Lake
City in Illinois, United States1914Established
40,269Population
20 sq miArea
942 ftElevation
Crystal Lake is a city in McHenry County, Illinois, United States. Named after a lake 1.6 miles (2.6 km) southwest of the city's downtown, Crystal Lake is 45 miles (72 km) northwest of Chicago. The population was 40,269 as of the 2020 census. Crystal Lake is the most populous city in McHenry County, part of the Chicago metropolitan area.
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ZIP code60012, 60014, 60039