Crystal Lake, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Crystal Lake, Illinois is 40,436 as of the 2023 American Community Survey, making it the 41st-largest city in Illinois. The median household income is $105,428, the median home value is $287,400, and the median age is 39.5.
The population has grown 1.8% since 2010 (40,766 → 41,513).
40,436
Population
2130
People / sq mi
$105,428
Median Income
$287,400
Median Home Value
Crystal Lake covers 19.0 sq mi of land at 2130 people per square mile.
About Crystal Lake, IL
Crystal Lake is a city in Illinois with a population of 40,436. It ranks #41 among cities in Illinois by population. The median age is 39.5, in line with the national median. The population is 48.5% male and 51.5% female.
The median household income in Crystal Lake is $105,428, above the US median of $74,580. 4.1% of residents live below the federal poverty level. Home values sit at a median of $287,400, with monthly rent averaging $1,431. The homeownership rate of 78.0% is higher than the national rate of 64.8%.
Educational attainment in Crystal Lake reflects 42.0% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 13.9% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 29.6 minutes each way.
Crystal Lake city Population History (2010-2024)
The city of Crystal Lake city had a population of 40,766 in 2010 and 41,513 in 2024, a 1.8% growth over 14 years. The peak was 41,513 in 2024. Average annual growth rate: 0.13%.
41,513
Population (2024)
40,766
Population (2010)
41,513
Peak (2024)
0.13%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 40,766 |
| 2011 | 40,618 |
| 2012 | 40,469 |
| 2013 | 40,375 |
| 2014 | 40,439 |
| 2015 | 40,332 |
| 2016 | 40,118 |
| 2017 | 40,069 |
| 2018 | 39,993 |
| 2019 | 39,829 |
| 2020 | 40,240 |
| 2021 | 40,501 |
| 2022 | 40,676 |
| 2023 | 40,941 |
| 2024 | 41,513 |
Race & Ethnicity
| White | 85.0% |
| Black or African American | 0.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Economy & Income
$105,428
Median Household Income
$46,199
Per Capita Income
4.1%
Poverty Rate
3.2%
Unemployment Rate
Housing
$287,400
Median Home Value
$1,431
Median Rent
78.0%
Owner-Occupied
Education
94.8%
High School+
42.0%
Bachelor's+
Commute
1.9%
Drive Alone
73.1%
Public Transit
13.9%
Work From Home
29.6 min
Avg Commute
Community Profile
16.6%
Foreign Born
85.7%
Non-English at Home
4.1%
Veterans
9.4%
With Disability
96.4%
Health Insurance
98.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 19.6% |
| Manufacturing | 13.2% |
| Finance, Insurance & Real Estate | 11.7% |
| Education, Health Care & Social Services | 10.2% |
| Information | 8.1% |
| Construction | 7.3% |
| Retail Trade | 5.2% |
| Arts, Entertainment & Food Services | 4.4% |
| Public Administration | 3.0% |
| Transportation & Warehousing | 1.9% |
| Agriculture & Mining | 0.3% |
Largest cities in Illinois
Largest counties in Illinois
Part of Illinois
Metro areas in Illinois
City rankings
Frequently Asked Questions
Crystal Lake, Illinois has a population of 40,436 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 41st-largest city in Illinois.
The median household income in Crystal Lake, Illinois is $105,428, with 4.1% of residents living below the federal poverty level.
The median home value in Crystal Lake, Illinois is $287,400, with median monthly rent at $1,431 and a homeownership rate of 78.0%.
The median age in Crystal Lake, Illinois is 39.5 years. The population is 48.5% male and 51.5% female.
The population has grown 1.8% since 2010 (40,766 → 41,513).
More from Illinois
Population 2,707,648
Population 179,867
Population 149,785
Population 149,424
Population 147,649
Full rankings of Illinois cities by population
Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.