Map of Crystal Lake, United States

Crystal Lake is a city in Illinois, United States, with a population of about 40,448. It lies at 42.2411°N, 88.3162°W, about 279 m above sea level. Crystal Lake is about 1,022 km (635 mi) northwest of Washington, D.C., the capital. The nearest city on our map is Carpentersville, 14 km to the south.

Crystal Lake at a glance

Where is Crystal Lake?

• Located in the Northern and Western hemispheres.
• Daylight ranges from about 9 h 05 min on the shortest day to 15 h 16 min on the longest day (around 21 December and 21 June).

Cities near Crystal Lake

• Carpentersville — 14 km south
• Elgin — 23 km south
• Palatine — 27 km southeast
• Bartlett — 29 km south
• Hoffman Estates — 29 km southeast
• Schaumburg — 30 km southeast
• Buffalo Grove — 31 km east
• Arlington Heights — 32 km southeast
• Mount Prospect — 37 km southeast
• Elk Grove Village — 39 km southeast

Largest cities in Illinois

• Chicago — 2,664,452
• Aurora — 200,661
• Rockford — 148,278
• Joliet — 147,861
• Naperville — 147,100
• Peoria — 115,070
• Springfield — 114,394
• Elgin — 112,111
• Waukegan — 88,475
• Champaign — 86,096

Largest cities in United States

• New York City — 8,804,190
• Los Angeles — 3,820,914
• Brooklyn — 2,736,074
• Chicago — 2,664,452
• Queens — 2,316,841
• Houston — 2,314,157
• Phoenix — 1,650,070
• Philadelphia — 1,573,916
• San Antonio — 1,526,656
• Manhattan — 1,487,536

Map of United States and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.