Big Rock, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Big Rock, Illinois had a total population of 1,548, the 571st largest village in Illinois, with a median household income of $162,854, which is 95% higher than the state average. The poverty rate is 3.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 95% above the state average — one of the wealthiest communities in Illinois.
- An exceptionally low poverty rate of 3.2% — among the lowest in Illinois.
- Housing is very affordable with a home-value-to-income ratio of just 2.1x.
- Near full employment with an unemployment rate of just 2.2%.
Big Rock Quick Facts
How Big Rock 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 | 1,208 | 1,548 | +28.1% |
| Median household income | $126,667 | $162,854 | +28.6% |
| Median home value | $290,100 | $337,900 | +16.5% |
How Big Rock 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+)
Big Rock Rankings in Illinois
Explore Illinois Rankings
Other Cities in Kane County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Carpentersville | 37,346 | $86,917 | 10.3% | $234,100 |
| Algonquin | 30,067 | $134,525 | 4.1% | $351,000 |
| Huntley | 28,005 | $88,536 | 8.6% | $334,300 |
| South Elgin | 24,217 | $127,203 | 6.5% | $339,100 |
| Montgomery | 21,515 | $103,734 | 6.7% | $299,500 |
| Geneva | 21,258 | $144,341 | 3.8% | $441,400 |
| North Aurora | 18,696 | $114,305 | 6.3% | $342,100 |
| Pingree Grove | 10,914 | $114,294 | 1.2% | $320,800 |
| Campton Hills | 10,877 | $209,134 | 2.9% | $547,500 |
| Sugar Grove | 9,240 | $121,207 | 4.7% | $401,900 |
Cities Similar to Big Rock
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Port Barrington | 1,477 | $149,886 | $379,600 | 49.2% | 2.7% |
| Heritage Lake | 1,522 | $133,048 | $207,300 | 33.7% | 7.8% |
| Leland Grove | 1,517 | $130,833 | $274,300 | 67.6% | 2.9% |
| Lake Camelot | 1,629 | $133,656 | $236,400 | 39.0% | 0.0% |
| Dunlap | 1,360 | $141,552 | $289,600 | 61.7% | 3.3% |
Population Overview
Big Rock is a small community located in Illinois, within Kane County. The total population is 1,548. It ranks as the 571st most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Big Rock is 49.4 years. This is 27% higher than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Big Rock is $162,854. This is 95% higher than the state median of $83,390. It is also 102% higher than the national median of $80,734. The poverty rate stands at 3.2%. This is 73% 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 2.2%. This is 62% lower than the state rate of 5.8%. The median home value is $337,900. Housing costs are 28% higher than the state median of $263,300. With a home-value-to-income ratio of just 2.1x, Big Rock is one of the most affordable housing markets in the area. 98.9% of occupied housing units are owner-occupied. This homeownership rate is 47% higher than the state average of 67.1%.
Race & Ethnicity
The largest racial or ethnic group in Big Rock is White (non-Hispanic), making up 70.8% of the population. Hispanic or Latino residents account for 9.8%. The Black or African American population (0.2%) is well below the state average of 13.3%. The Asian population (0.8%) is well below the state average of 5.9%.
Education
20.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 45% 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 97.4%.
Data Sources & Methodology
All demographic data for Big Rock, 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 Big Rock, Illinois?
Big Rock, Illinois has a population of 1,548 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Big Rock, IL?
The median household income in Big Rock is $162,854, which is 102% higher than the national median of $80,734.
What is the poverty rate in Big Rock, IL?
The poverty rate in Big Rock is 3.2%. This means approximately 50 residents live below the federal poverty line.
What is the racial makeup of Big Rock, Illinois?
Big Rock's population is 70.8% White, 0.2% Black, 9.8% Hispanic/Latino, and 0.8% Asian.
What is the median home value in Big Rock, IL?
The median home value in Big Rock is $337,900. The home-value-to-income ratio is 2.1x.
How educated is Big Rock, Illinois?
20.6% of adults (25+) in Big Rock hold a bachelor's degree or higher, and 5.9% hold a graduate or professional degree.