Northbrook, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Northbrook, Illinois is 34,642 as of the 2023 American Community Survey, making it the 54th-largest city in Illinois. The median household income is $155,321, the median home value is $644,100, and the median age is 49.2.
The population has grown 3.9% since 2010 (33,237 → 34,546).
34,642
Population
2615
People / sq mi
$155,321
Median Income
$644,100
Median Home Value
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Northbrook covers 13.2 sq mi of land at 2615 people per square mile.
About Northbrook, IL
Educational attainment is the headline number in Northbrook: 73.1% of adults 25 and older have a four-year degree. With 34,642 residents, Northbrook is a city in Illinois.
Households here are among the highest-earning of all US cities: median income is $155,321, above the US median of $78,538. The poverty rate, 2.4%, is on the lower side for US cities and below the national 12.4%. The median home value is $644,100, with typical rent around $2,334.
The population is unusually well-credentialed for US cities — 73.1% of adults have a four-year degree, above the national 35.0%. An unusually large 27.4% of workers are remote, above the national 14.0%, and the average commute runs about 28 minutes each way.
The education numbers are the throughline: a college-heavy population in Northbrook usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Northbrook village Population History (2010-2024)
The city of Northbrook village had a population of 33,237 in 2010 and 34,546 in 2024, a 3.9% growth over 14 years. The peak was 35,152 in 2020. Average annual growth rate: 0.29%.
34,546
Population (2024)
33,237
Population (2010)
35,152
Peak (2020)
0.29%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 33,237 |
| 2011 | 33,400 |
| 2012 | 33,541 |
| 2013 | 33,657 |
| 2014 | 33,711 |
| 2015 | 33,653 |
| 2016 | 33,517 |
| 2017 | 33,334 |
| 2018 | 33,110 |
| 2019 | 32,958 |
| 2020 | 35,152 |
| 2021 | 34,613 |
| 2022 | 34,268 |
| 2023 | 34,291 |
| 2024 | 34,546 |
Race & Ethnicity
| White | 75.5% |
| Black or African American | 2.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.1% |
| Two or More Races | 0.0% |
Economy & Income
$155,321
Median Household Income
$85,680
Per Capita Income
2.4%
Poverty Rate
2.0%
Unemployment Rate
Housing
$644,100
Median Home Value
$2,334
Median Rent
86.6%
Owner-Occupied
Education
97.3%
High School+
73.1%
Bachelor's+
Commute
7.0%
Drive Alone
56.9%
Public Transit
27.4%
Work From Home
27.7 min
Avg Commute
Community Profile
18.6%
Foreign Born
74.6%
Non-English at Home
3.7%
Veterans
8.2%
With Disability
98.0%
Health Insurance
95.8%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.8% |
| Finance, Insurance & Real Estate | 22.2% |
| Information | 14.8% |
| Manufacturing | 7.7% |
| Education, Health Care & Social Services | 5.2% |
| Construction | 4.4% |
| Arts, Entertainment & Food Services | 3.8% |
| Retail Trade | 2.6% |
| Transportation & Warehousing | 2.5% |
| Public Administration | 1.5% |
| Agriculture & Mining | 0.1% |
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City rankings
Frequently Asked Questions
Northbrook, Illinois has a population of 34,642 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 54th-largest city in Illinois.
The median household income in Northbrook, Illinois is $155,321, with 2.4% of residents living below the federal poverty level.
The median home value in Northbrook, Illinois is $644,100, with median monthly rent at $2,334 and a homeownership rate of 86.6%.
The median age in Northbrook, Illinois is 49.2 years. The population is 48.6% male and 51.4% female.
The population has grown 3.9% since 2010 (33,237 → 34,546).
Northbrook village, IL Climate
Northbrook village, IL has an average annual temperature of 9.5°C (49°F) and receives about 900 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.5°C
Avg Temp
900
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 22° | 43 mm |
| February | -3° / 27° | 36 mm |
| March | 3° / 37° | 64 mm |
| April | 9° / 48° | 92 mm |
| May | 15° / 59° | 87 mm |
| June | 20° / 68° | 96 mm |
| July | 23° / 73° | 93 mm |
| August | 22° / 72° | 105 mm |
| September | 18° / 64° | 90 mm |
| October | 11° / 53° | 64 mm |
| November | 4° / 39° | 71 mm |
| December | -2° / 28° | 59 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Northbrook village, IL
The most comfortable months to visit Northbrook village, IL are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). August is usually the wettest month.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.