Crystal Lake, IL
Population 40,436 · Illinois
About Crystal Lake, IL
Crystal Lake is a mid-sized city in Illinois with a population of 40,436 residents. The median household income is $105,428 per year, which is above the national average. The median age in Crystal Lake is 39.5 years.
Housing in Crystal Lake has a median home value of $287,400 and median monthly rent of $1,431. Of the 15,396 total housing units, the majority are owner-occupied, with 11,642 owner-occupied and 3,275 renter-occupied units.
The unemployment rate in Crystal Lake is 4.6% and the poverty rate is 6.1%. 42.0% of residents hold a bachelor's degree or higher. The average commute time is 29.6 minutes.
How Crystal Lake Ranks in Illinois
Cost of Living in Crystal Lake, IL
Compared to national averages, Crystal Lake has a median household income of $105,428 (40% above the national median of $75,149). Home values average $287,400, which is 17% above the national median. Monthly rent at $1,431 is 23% above the US average of $1,163. Within Illinois, Crystal Lake's income is 40% above the state average of $75,072, and home values are 73% above the state median of $165,779.
Why Live in Crystal Lake, IL?
Crystal Lake offers a strong local economy with a median household income of $105,428, well above the national average, and a well-educated community where 42.0% of residents hold a bachelor’s degree or higher, and a low poverty rate of 6.1%, better than the national average.
Crystal Lake has a population of 40,436 with a median age of 39.5 years. Compare Crystal Lake with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Crystal Lake
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| DeKalb | 40,464 | $46,564 | $202,900 | Compare |
| Bartlett | 40,531 | $130,479 | $350,500 | Compare |
| Romeoville | 40,996 | $100,022 | $245,200 | Compare |
| Carol Stream | 39,427 | $105,395 | $308,700 | Compare |
| Park Ridge | 39,241 | $138,059 | $539,300 | Compare |
| Quincy | 39,188 | $56,372 | $146,100 | Compare |
| Belleville | 41,722 | $60,529 | $131,000 | Compare |
| Streamwood | 39,055 | $101,049 | $258,300 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Illinois
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Crystal Lake
What is the population of Crystal Lake, IL?
The population of Crystal Lake, IL is 40,436 according to the latest Census data.
What is the median household income in Crystal Lake?
The median household income in Crystal Lake, IL is $105,428 per year.
What is the median home value in Crystal Lake?
The median home value in Crystal Lake, IL is $287,400.
What is the average rent in Crystal Lake?
The median monthly rent in Crystal Lake, IL is $1,431.
What is the unemployment rate in Crystal Lake?
The unemployment rate in Crystal Lake, IL is 4.6%.