Round Lake, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Round Lake, Illinois had a total population of 18,628, the 132nd largest village in Illinois, with a median household income of $111,977, which is 34% higher than the state average. The poverty rate is 9.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 34% above the state average — one of the wealthiest communities in Illinois.
- Housing is very affordable with a home-value-to-income ratio of just 2.5x.
Round Lake Quick Facts
How Round Lake 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 | 18,588 | 18,628 | +0.2% |
| Median household income | $108,965 | $111,977 | +2.8% |
| Median home value | $257,400 | $278,600 | +8.2% |
How Round Lake 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
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Round Lake 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 |
| Grayslake | 20,929 | $113,972 | 6.3% | $309,500 |
| Libertyville | 20,525 | $165,667 | 4.2% | $512,000 |
Cities Similar to Round Lake
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| North Aurora | 18,696 | $114,305 | $342,100 | 40.5% | 6.3% |
| Cary | 17,923 | $113,026 | $309,800 | 44.7% | 4.8% |
| Brookfield | 19,331 | $110,295 | $332,400 | 42.3% | 5.4% |
| Shorewood | 18,343 | $122,105 | $337,800 | 41.1% | 5.2% |
| Matteson | 18,645 | $95,457 | $250,600 | 39.7% | 9.7% |
Population Overview
Round Lake is a small city located in Illinois, within Lake County. The total population is 18,628. It ranks as the 132nd most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Round Lake is 36.1 years. This is 7% lower than the state median of 39.0 years. With 28.2% of the population under 18, Round Lake has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Round Lake is $111,977. This is 34% higher than the state median of $83,390. It is also 39% higher than the national median of $80,734. The poverty rate stands at 9.0%. This is 24% lower than the state poverty rate of 11.8%. The unemployment rate is 6.0%. This is 4% higher than the state rate of 5.8%. The median home value is $278,600. Housing costs are 6% higher than the state median of $263,300. With a home-value-to-income ratio of just 2.5x, Round Lake is one of the most affordable housing markets in the area. 77.3% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 67.1%.
Race & Ethnicity
Round Lake is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Hispanic or Latino residents account for 35.8%. The Black or African American population (3.7%) is well below the state average of 13.3%. The Hispanic or Latino population is significantly higher than the state average (35.8% vs 18.8%). The Asian population is significantly higher than the state average (12.1% vs 5.9%).
Education
41.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% 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 87.8%.
Data Sources & Methodology
All demographic data for Round Lake, 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 Round Lake, Illinois?
Round Lake, Illinois has a population of 18,628 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Round Lake, IL?
The median household income in Round Lake is $111,977, which is 39% higher than the national median of $80,734.
What is the poverty rate in Round Lake, IL?
The poverty rate in Round Lake is 9.0%. This means approximately 1,668 residents live below the federal poverty line.
What is the racial makeup of Round Lake, Illinois?
Round Lake's population is 44.5% White, 3.7% Black, 35.8% Hispanic/Latino, and 12.1% Asian.
What is the median home value in Round Lake, IL?
The median home value in Round Lake is $278,600. The home-value-to-income ratio is 2.5x.
How educated is Round Lake, Illinois?
41.5% of adults (25+) in Round Lake hold a bachelor's degree or higher, and 10.0% hold a graduate or professional degree.