Northbrook, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Northbrook, 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 Top grade
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A+
Income Top grade
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A+
Education Top grade
Source: Map AI Methodology
Population
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 32,185 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 2417.5 | 219.1 | 86.4 |
| Population growth (%/yr) | 0.22% | -0.16% | 0.59% |
| Median age | 46.4 | 37.4 | 37.3 |
| Households | 12,442 | 5,035,584 | 130,235,071 |
Population in Northbrook grew by 1.8% from 2009 to 2024, reaching 32,185 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Northbrook is Gen X, aged 45–60, at 24.2% of residents. That is 3.8 points above Illinois as a whole.
- Gen Z 13–28 4,502 14.0% -7.3 pts
- Millennials 29–44 5,201 16.2% -5.7 pts
- Gen X 45–60 7,791 24.2% +3.8 pts
- Boomers 61–79 7,202 22.4% +5.5 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 51.5% of the people living in Northbrook and men 48.5%.
- Women 51.5% Illinois 50.6%
- Men 48.5% Illinois 49.4%
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Economy
Northbrook has a the economy index of A+, which means it is exceptionally prosperous.
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $153,635 | $84,042 | $80,455 |
| Income growth (%/yr) | 3.59% | 4.46% | 4.80% |
| Unemployment rate | 3.1% | 5.8% | 5.2% |
The median household income in Northbrook is about 83% higher than in Illinois.
Housing
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $764,513 | $149,936 | $248,835 |
| Median rent | $2,507 | $1,274 | $1,407 |
| Homeownership rate | 84.4% | 67.1% | 65.2% |
The median home price in Northbrook is about 25.4 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,507 per month for that long.
Commute Time & Mobility
Commuters in Northbrook spend about 46 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 191 hours, about 8.0 full days, spent commuting.
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 22.9 | 23.6 | 22.4 |
| Round-trip commute (min) | 45.8 | 47.3 | 44.8 |
| Yearly time spent (hours) | 191 | 197 | 187 |
| Estimated yearly cost | $5,915 | $6,104 | $5,790 |
| Work from home | 30.9% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | 18,990 | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 3,037 | 1,547 | 1,355 |
The average commute time in Northbrook is 23 minutes, shorter 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
Northbrook has a education index of A+, which means it is exceptionally educated.
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 69.3% | 34.1% | 31.6% |
| Average household size | 2.55 | 2.46 | 2.53 |
Health
Northbrook has a health index of A+, which means it is exceptionally healthy.
| Metric | Northbrook | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 84.3 | 77.9 | 78.3 |
| Self-rated poor health | 8.3% | 15.6% | 16.3% |
| Smokers | 7.6% | 19.2% | 19.0% |
Northbrook, IL Compared With Nearby Cities
How Northbrook, IL compares with the 2 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Northbrook, IL | 32,185 | $153,635 #2/3 | $764,513 #1/3 | 22.9 min #2/3 |
| Glenview, IL | 47,742 | $133,416 | $728,638 | 23.7 min |
| Highland Park, IL | 26,861 | $181,844 | $337,081 | 22.6 min |
Frequently Asked Questions
Common questions about Northbrook, Illinois.
What is the population of Northbrook, Illinois?
About 32,185 people live in Northbrook, Illinois, in 12,442 households of 2.5 people on average. The median age is 46.4, so residents are older than the U.S. median of 37.3 by about 9 years.
Is Northbrook, Illinois mostly urban or rural?
Averaged over its land area, Northbrook, Illinois has 2,418 people per square mile, a density typical of urban and suburban areas. That is about 28 times the U.S. average of 86.
How affordable is housing in Northbrook, Illinois?
The median home costs 5.0 times the median household income ($764,513 against $153,635), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $2,507 a month takes about 20% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Northbrook, Illinois?
Unemployment in Northbrook, Illinois is only 3.1%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in Northbrook, Illinois?
69.3% of adults in Northbrook, Illinois hold a bachelor's degree or higher (about 7 in 10), well above the U.S. share of 31.6%.
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