Crystal Lake, Illinois

Crystal Lake, Illinois
Downtown Crystal Lake
Motto: 
A Good Place To Live
Location of Crystal Lake in McHenry County, Illinois
Coordinates: 42°14′45″N 88°22′50″W / 42.24583°N 88.38056°W / 42.24583; -88.38056
Country United States
State Illinois
County McHenry
TownshipsAlgonquin, Dorr, Nunda, Grafton
Adoption of city charterSeptember 23, 1914
Government
 • TypeCouncil-manager
 • MayorHaig Haleblian
Area
 • Total
19.53 sq mi (50.59 km2)
 • Land18.92 sq mi (49.00 km2)
 • Water0.61 sq mi (1.59 km2)
Elevation
899 ft (274 m)
Population
 (2020)
 • Total
40,269
 • Density2,128.6/sq mi (821.87/km2)
Time zoneUTC−6 (CST)
 • Summer (DST)UTC−5 (CDT)
ZIP Code(s)
60012, 60014, 60039
Area codes815/779
FIPS code17-17887
GNIS feature ID2393685
Home value:$308,837 (2023)
Websitewww.crystallake.org

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.