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 and multiracial populations.

Population by Race

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%

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