Grayslake, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Grayslake, Illinois had a total population of 20,929, the 115th largest village in Illinois, with a median household income of $113,972, which is 37% higher than the state average. The poverty rate is 6.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 37% above the state average — one of the wealthiest communities in Illinois.
- 58.5% of adults hold a bachelor's degree or higher — top 10% in Illinois.
Grayslake Quick Facts
How Grayslake Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 20,707 | 20,929 | +1.1% |
| Median household income | $113,697 | $113,972 | +0.2% |
| Median home value | $293,900 | $309,500 | +5.3% |
How Grayslake Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Grayslake Rankings in Illinois
Explore Illinois Rankings
Other Cities in Lake County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Waukegan | 89,076 | $71,919 | 15.3% | $190,900 |
| Mundelein | 31,915 | $108,340 | 8.2% | $309,700 |
| North Chicago | 30,643 | $60,172 | 24.5% | $159,600 |
| Gurnee | 30,510 | $119,628 | 5.2% | $344,300 |
| Highland Park | 30,398 | $168,094 | 4.2% | $607,300 |
| Round Lake Beach | 27,079 | $86,059 | 14.8% | $199,200 |
| Vernon Hills | 26,876 | $121,943 | 6.1% | $412,300 |
| Zion | 24,600 | $63,104 | 16.0% | $183,800 |
| Libertyville | 20,525 | $165,667 | 4.2% | $512,000 |
| Lake Zurich | 19,832 | $135,968 | 3.4% | $435,300 |
Cities Similar to Grayslake
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Darien | 21,879 | $111,215 | $398,700 | 52.4% | 4.2% |
| Montgomery | 21,515 | $103,734 | $299,500 | 28.7% | 6.7% |
| Mokena | 20,021 | $123,889 | $401,400 | 42.5% | 4.5% |
| Roselle | 22,752 | $111,318 | $344,700 | 40.9% | 4.1% |
| Brookfield | 19,331 | $110,295 | $332,400 | 42.3% | 5.4% |
Population Overview
Grayslake is a small city located in Illinois, within Lake County. The total population is 20,929. It ranks as the 115th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Grayslake is 37.2 years. This is 5% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Grayslake is $113,972. This is 37% higher than the state median of $83,390. It is also 41% higher than the national median of $80,734. The poverty rate stands at 6.3%. This is 47% lower than the state poverty rate of 11.8%. The unemployment rate is 5.4%. This is 7% lower than the state rate of 5.8%. The median home value is $309,500. Housing costs are 18% higher than the state median of $263,300. With a home-value-to-income ratio of just 2.7x, Grayslake is one of the most affordable housing markets in the area. 78.2% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 67.1%.
Race & Ethnicity
The largest racial or ethnic group in Grayslake is White (non-Hispanic), making up 71.1% of the population. Hispanic or Latino residents account for 10.2%.
Education
58.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Grayslake in the top 10% of all cities in the state for educational attainment. This is 54% higher than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.0%. Notably, 23.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Grayslake, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Grayslake, Illinois?
Grayslake, Illinois has a population of 20,929 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Grayslake, IL?
The median household income in Grayslake is $113,972, which is 41% higher than the national median of $80,734.
What is the poverty rate in Grayslake, IL?
The poverty rate in Grayslake is 6.3%. This means approximately 1,313 residents live below the federal poverty line.
What is the racial makeup of Grayslake, Illinois?
Grayslake's population is 71.1% White, 8.5% Black, 10.2% Hispanic/Latino, and 5.1% Asian.
What is the median home value in Grayslake, IL?
The median home value in Grayslake is $309,500. The home-value-to-income ratio is 2.7x.
How educated is Grayslake, Illinois?
58.5% of adults (25+) in Grayslake hold a bachelor's degree or higher, and 23.7% hold a graduate or professional degree.