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City in McHenry County, Illinois

Crystal Lake

District lines run through Crystal Lake, so who represents you here depends on your street. Search your address to see yours.

Who lives in Crystal Lake

Census survey estimates for 2020 to 2024, rounded.

People

Population
40,600
Median age
39.3 years
Under 18
23%
65 and over
15%
Veterans, of adults
4%
Speak another language at home
17%

Race and ethnicity

Hispanic or Latino, of any race
14%
White, not Hispanic
78%
Black, not Hispanic
1%
Asian, not Hispanic
4%

Income and housing

Median household income
$108,400
Below the poverty line
7%
Bachelor's or higher, adults 25+
42%
Owner-occupied homes
78%
Median home value
$311,000

2024 vote for president

Not counted for Crystal Lake on its own: its precincts follow township lines, not the town’s. See the figure for McHenry County.

Represent all of Crystal Lake

Represent part of Crystal Lake

Each represents the part of Crystal Lake inside their district. Under each is how many people lived in that part at the 2020 Census, of 40,269 in all.

Crystal Lake's districts (9)

U.S. House (2)

Illinois Senate (3)

Illinois House (4)

Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.