Crystal Lake
Crystal Lake is significantly wealthier than the US average, with a median household income of $108,418. Population has held roughly steady since 2000. Median home value has more than doubled since 2000, reaching $311,400. It sits in the top 10% of US cities for household income. Households here earn about 30% more than the Illinois median.
Population & growth
PEP 2025 EST:42,288 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Education
Commute & transportation
Work & employment
People & community
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How many people live in Crystal Lake, Illinois?
Crystal Lake, Illinois has about 40,579 residents according to the 2024 American Community Survey.
What is the median household income in Crystal Lake, Illinois?
The typical household in Crystal Lake, Illinois earns about $108,418 a year. Half of households make more than that, and half make less.
Is Crystal Lake, Illinois expensive?
In Crystal Lake, Illinois, the median home is worth about $311,400, and the typical rent is about $1,468 a month.
How educated are people in Crystal Lake, Illinois?
About 42.0% of adults age 25 and over in Crystal Lake, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Crystal Lake, Illinois?
About 6.8% of people in Crystal Lake, Illinois live below the federal poverty line.
Has Crystal Lake, Illinois grown since 1990?
Yes, Crystal Lake, Illinois has grown since 1990. The population has added about 16,067 residents, a change of about 66 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024