Wonder Lake, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Wonder Lake, Illinois had a total population of 4,292, the 362nd largest village in Illinois, with a median household income of $94,655, which is 14% higher than the state average. The poverty rate is 2.9%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- An exceptionally low poverty rate of 2.9% — among the lowest in Illinois.
Wonder Lake Quick Facts
How Wonder 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 | 4,141 | 4,292 | +3.6% |
| Median household income | $102,829 | $94,655 | -7.9% |
| Median home value | $242,300 | $252,200 | +4.1% |
How Wonder 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
Moderate diversity with one or two groups making up the majority.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Wonder Lake Rankings in Illinois
Explore Illinois Rankings
Other Cities in McHenry County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Crystal Lake | 40,579 | $108,418 | 6.8% | $311,400 |
| Lake in the Hills | 28,800 | $117,151 | 4.1% | $321,900 |
| McHenry | 28,074 | $86,315 | 4.7% | $266,500 |
| Woodstock | 26,147 | $82,758 | 6.0% | $245,700 |
| Cary | 17,923 | $113,026 | 4.8% | $309,800 |
| Harvard | 9,598 | $67,617 | 11.8% | $175,400 |
| Marengo | 7,040 | $73,523 | 15.7% | $229,900 |
| Johnsburg | 6,386 | $121,023 | 12.1% | $328,300 |
| Spring Grove | 5,917 | $134,210 | 1.4% | $398,400 |
| Lakewood | 4,707 | $173,625 | 3.5% | $552,600 |
Cities Similar to Wonder Lake
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Breese | 4,301 | $85,222 | $229,600 | 39.4% | 4.2% |
| Lebanon | 4,474 | $88,750 | $170,700 | 38.7% | 14.8% |
| Coal Valley | 4,229 | $106,850 | $215,700 | 34.8% | 3.9% |
| Auburn | 4,306 | $81,411 | $149,600 | 27.6% | 8.1% |
| Freeburg | 4,592 | $92,065 | $241,200 | 29.2% | 6.7% |
Population Overview
Wonder Lake is a small community located in Illinois, within McHenry County. The total population is 4,292. It ranks as the 362nd most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Wonder Lake is 33.8 years. This is 13% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Wonder Lake is $94,655. This is 14% higher than the state median of $83,390. It is also 17% higher than the national median of $80,734. The poverty rate stands at 2.9%. This is 76% lower than the state poverty rate of 11.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 7.2%. This is 23% higher than the state rate of 5.8%. The median home value is $252,200. Housing costs are 4% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.7x, Wonder Lake is one of the most affordable housing markets in the area. 99.6% of occupied housing units are owner-occupied. This homeownership rate is 48% higher than the state average of 67.1%.
Race & Ethnicity
The largest racial or ethnic group in Wonder Lake is White (non-Hispanic), making up 72.1% of the population. Hispanic or Latino residents account for 22.8%. The Asian population (0.9%) is well below the state average of 5.9%.
Education
21.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 42% lower 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 95.7%.
Data Sources & Methodology
All demographic data for Wonder 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 Wonder Lake, Illinois?
Wonder Lake, Illinois has a population of 4,292 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Wonder Lake, IL?
The median household income in Wonder Lake is $94,655, which is 17% higher than the national median of $80,734.
What is the poverty rate in Wonder Lake, IL?
The poverty rate in Wonder Lake is 2.9%. This means approximately 122 residents live below the federal poverty line.
What is the racial makeup of Wonder Lake, Illinois?
Wonder Lake's population is 72.1% White, 0.0% Black, 22.8% Hispanic/Latino, and 0.9% Asian.
What is the median home value in Wonder Lake, IL?
The median home value in Wonder Lake is $252,200. The home-value-to-income ratio is 2.7x.
How educated is Wonder Lake, Illinois?
21.8% of adults (25+) in Wonder Lake hold a bachelor's degree or higher, and 5.9% hold a graduate or professional degree.