Crystal Lake

County:: McHenry County
County Seat:: No
Area (mi²):: 18.985
State:: Illinois

Crystal Lake is a city located in McHenry County, Illinois. Crystal Lake has a 2025 population of 41,282. Crystal Lake is currently growing at a rate of 0.51% annually and its population has increased by 2.62% since the most recent census, which recorded a population of 40,229 in 2020.

The average household income in Crystal Lake is $122,862 with a poverty rate of 6.1%. The median age in Crystal Lake is 39.5 years: 38.9 years for males, and 39.9 years for females.

Demographics

The racial composition of Crystal Lake includes 84.99% White, 4.44% other race, 3.4% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	34,365	84.99%
Two or more races	2,586	6.4%
Other race	1,796	4.44%
Asian	1,375	3.4%
Black or African American	226	0.56%
Native American	88	0.22%
Native Hawaiian or Pacific Islander	0	0%

Crystal Lake Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Crystal Lake's average per capita income is $59,720. Household income levels show a median of $105,428. The poverty rate stands at 6.1%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$134,105	-
Families	$121,977	$138,413
Households	$105,428	$122,862
Non Families	$62,022	$74,161

$59,720

Average Income

$105,428

Median Household Income

6.1%

Poverty Rate