Crystal Lake, Illinois

Crystal Lake population, 2020 to 2024

Crystal Lake added 1,273 residents from July 2020 to July 2024, a change of +3.2%. In the latest year it moved by +572. Among 330 Illinois places of 5,000 or more, that growth ranks 32nd; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Crystal Lake is 2.8 times that size.

Crystal Lake covers 18.99 square miles of land and 0.61 of water, for 2,186 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Crystal Lake is close to the typical town.

What county Crystal Lake is in

All of Crystal Lake's residents live in McHenry County, which had 315,959 residents in 2024. Crystal Lake holds 13.1% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Crystal Lake

2 ZIP Code Tabulation Areas (ZCTAs) overlap Crystal Lake by at least 10% of the ZCTA's or the city's land: 60012, 60014. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Crystal Lake is

The Census internal point of Crystal Lake is at 42.233200, -88.334400. Springfield, the capital, is 182.8 miles SSW in a straight line. The nearest larger place is Elgin, IL (114,701 people), 13.4 miles away.

Daylight in Crystal Lake

At 42.23° N, Crystal Lake gets about 15 h 16 min of daylight around the June solstice and 9 h 05 min around the December solstice, a swing of 6 h 11 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Crystal Lake

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Lakewood, 2.7 miles away, with 4,287 people.