Algonquin, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Algonquin, IL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above average
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A
Income Above average
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B
Education Around average
Source: Map AI Methodology
Population
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 28,443 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 2235.6 | 219.1 | 86.4 |
| Population growth (%/yr) | 0.09% | -0.16% | 0.59% |
| Median age | 40.4 | 37.4 | 37.3 |
| Households | 10,229 | 5,035,584 | 130,235,071 |
Population in Algonquin declined by 4.2% from 2009 to 2024, reaching 28,443 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Algonquin is Gen X, aged 45–60, at 25.4% of residents. That is 5.0 points above Illinois as a whole.
- Gen Z 13–28 5,903 20.8% -0.5 pts
- Millennials 29–44 6,196 21.8% on par
- Gen X 45–60 7,215 25.4% +5.0 pts
- Boomers 61–79 3,843 13.5% -3.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Illinois, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.8% of the people living in Algonquin and men 49.2%.
- Women 50.8% Illinois 50.6%
- Men 49.2% Illinois 49.4%
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Economy
Algonquin has a the economy index of A, which means it is very prosperous.
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $127,830 | $84,042 | $80,455 |
| Income growth (%/yr) | 3.64% | 4.46% | 4.80% |
| Unemployment rate | 5.3% | 5.8% | 5.2% |
The median household income in Algonquin is about 52% higher than in Illinois.
Housing
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $187,499 | $149,936 | $248,835 |
| Median rent | $1,787 | $1,274 | $1,407 |
| Homeownership rate | 86.6% | 67.1% | 65.2% |
The median home price in Algonquin is about 8.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,787 per month for that long.
Commute Time & Mobility
Commuters in Algonquin spend about 60 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 252 hours, about 10.5 full days, spent commuting.
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 30.2 | 23.6 | 22.4 |
| Round-trip commute (min) | 60.4 | 47.3 | 44.8 |
| Yearly time spent (hours) | 252 | 197 | 187 |
| Estimated yearly cost | $7,806 | $6,104 | $5,790 |
| Work from home | 21.9% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | — | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 4,019 | 1,547 | 1,355 |
The average commute time in Algonquin is 30 minutes, longer than the 24 minutes in Illinois.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Algonquin has a education index of B, which means it is quite educated.
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 37.7% | 34.1% | 31.6% |
| Average household size | 2.78 | 2.46 | 2.53 |
Health
Algonquin has a health index of A, which means it is very healthy.
| Metric | Algonquin | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.5 | 77.9 | 78.3 |
| Self-rated poor health | 9.6% | 15.6% | 16.3% |
| Smokers | 14.0% | 19.2% | 19.0% |
Algonquin, IL Compared With Nearby Cities
How Algonquin, IL compares with the 2 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Algonquin, IL | 28,443 | $127,830 #1/3 | $187,499 #2/3 | 30.2 min #2/3 |
| Lake in the Hills, IL | 25,084 | $111,348 | $271,105 | 30.4 min |
| Carpentersville, IL | 23,807 | $87,936 | $6,593 | 27.1 min |
Frequently Asked Questions
Common questions about Algonquin, Illinois.
What is the population of Algonquin, Illinois?
About 28,443 people live in Algonquin, Illinois, in 10,229 households of 2.8 people on average. The median age is 40.4, so residents are older than the U.S. median of 37.3 by about 3 years.
Is Algonquin, Illinois urban or rural?
Averaged over its land area, Algonquin, Illinois has 2,236 people per square mile, a density typical of urban and suburban areas. That is about 26 times the U.S. average of 86.
Can a typical household afford a home in Algonquin, Illinois?
The median home costs 1.5 times the median household income ($187,499 against $127,830), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,787 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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