Crystal Lake, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Crystal Lake, IL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above average
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A
Income Above average
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B
Education Around average
Source: Map AI Methodology
Population
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 37,884 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 1933.1 | 219.1 | 86.4 |
| Population growth (%/yr) | -0.35% | -0.16% | 0.59% |
| Median age | 38.1 | 37.4 | 37.3 |
| Households | 13,826 | 5,035,584 | 130,235,071 |
Population in Crystal Lake grew by 1.8% from 2009 to 2024, reaching 37,884 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Crystal Lake is Gen X, aged 45–60, at 22.5% of residents. That is 2.1 points above Illinois as a whole.
- Gen Z 13–28 7,862 20.8% -0.5 pts
- Millennials 29–44 8,206 21.7% -0.2 pts
- Gen X 45–60 8,533 22.5% +2.1 pts
- Boomers 61–79 5,496 14.5% -2.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Illinois, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.3% of the people living in Crystal Lake and men 49.7%.
- Women 50.3% Illinois 50.6%
- Men 49.7% Illinois 49.4%
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Economy
Crystal Lake has a the economy index of A, which means it is very prosperous.
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $106,177 | $84,042 | $80,455 |
| Income growth (%/yr) | 2.77% | 4.46% | 4.80% |
| Unemployment rate | 4.1% | 5.8% | 5.2% |
The median household income in Crystal Lake is about 26% higher than in Illinois.
Housing
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $254,750 | $149,936 | $248,835 |
| Median rent | $1,429 | $1,274 | $1,407 |
| Homeownership rate | 79.9% | 67.1% | 65.2% |
The median home price in Crystal Lake is about 14.9 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,429 per month for that long.
Commute Time & Mobility
Commuters in Crystal Lake spend about 46 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 193 hours, about 8.0 full days, spent commuting.
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.1 | 23.6 | 22.4 |
| Round-trip commute (min) | 46.3 | 47.3 | 44.8 |
| Yearly time spent (hours) | 193 | 197 | 187 |
| Estimated yearly cost | $5,976 | $6,104 | $5,790 |
| Work from home | 16.0% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | — | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 4,433 | 1,547 | 1,355 |
The average commute time in Crystal Lake is 23 minutes, shorter than the 24 minutes in Illinois.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Crystal Lake has a education index of B, which means it is quite educated.
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 37.4% | 34.1% | 31.6% |
| Average household size | 2.72 | 2.46 | 2.53 |
Health
Crystal Lake has a health index of A, which means it is very healthy.
| Metric | Crystal Lake | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.9 | 77.9 | 78.3 |
| Self-rated poor health | 10.0% | 15.6% | 16.3% |
| Smokers | 14.2% | 19.2% | 19.0% |
Crystal Lake, IL Compared With Nearby Cities
How Crystal Lake, IL compares with the 2 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Crystal Lake, IL | 37,884 | $106,177 #3/3 | $254,750 #2/3 | 23.1 min #1/3 |
| Lake in the Hills, IL | 25,084 | $111,348 | $271,105 | 30.4 min |
| Algonquin, IL | 28,443 | $127,830 | $187,499 | 30.2 min |
Frequently Asked Questions
Common questions about Crystal Lake, Illinois.
How many people live in Crystal Lake, Illinois?
About 37,884 people live in Crystal Lake, Illinois, in 13,826 households of 2.7 people on average. The median age is 38.1, close to the U.S. median of 37.3.
Is Crystal Lake, Illinois urban or rural?
Averaged over its land area, Crystal Lake, Illinois has 1,933 people per square mile, a density typical of urban and suburban areas. That is about 22 times the U.S. average of 86.
Is Crystal Lake, Illinois an affordable place to live?
The median home costs 2.4 times the median household income ($254,750 against $106,177), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,429 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Crystal Lake, Illinois?
Unemployment in Crystal Lake, Illinois is only 4.1%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
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