Village · Illinois
Northbrook, Illinois
Northbrook, village, in Cook County, Illinois. Northbrook had 34,744 residents on July 1, 2025 by the Census Bureau's estimate, down 1.5% since 2020; the 2020 Census counted 35,222 and the ACS 2020-2024 5-year estimates put it at 34,585 (±223). GEOID 1753481.
Residents, July 2025 estimate
34,744
Census Bureau estimate (no margin published)
2020 Census count: 35,222 · ACS 2020-2024: 34,585 ±223
Median household income
$157,782
±$19,596 (90% margin)
Illinois: $83,390
Median home value
$652,300
±$20,230 (90% margin)
Illinois: $263,300
Median gross rent
$2,463
±$303 (90% margin)
Illinois: $1,274
Where is Northbrook and what county is it in?
Northbrook is a village in Cook County, Illinois. It covers 13.2 square miles of land, 2,659 residents per square mile in 2020.
Northbrook is in the Chicago-Naperville-Elgin, IL-IN metropolitan statistical area, which takes in 13 counties (Census Bureau delineation, July 2023).
Northbrook lies mostly within Northfield Township and reaches into Wheeling Township, towns or townships with their own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Northbrook, and is it growing?
The Census Bureau estimates that 34,744 people lived in Northbrook on July 1, 2025, down 1.5% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 35,222 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 34,585 (±223).
| Measure | Northbrook | Cook County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 34,585 ±223 | 5,182,090 | +1,242 |
| Households | 13,302 ±464 | 2,100,230 | no clear change |
| Average household size | 2.55 ±0.08 | 2.43 | no clear change |
| Housing units | 14,435 ±538 | 2,276,493 | no clear change |
Northbrook's population since 2000
From 33,435 in 2000 to 34,744 in 2025: up 3.9%. The 2000, 2010 and 2020 figures are census counts, each for Northbrook as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Northbrook?
The median resident of Northbrook is 49.6 years old; 21.2% are under 18 and 26.6% are 65 or older. The largest group is non-Hispanic white residents at 73.8%, then non-Hispanic Asian residents at 16.2%. 20.7% of residents were born outside the United States.
| Measure | Northbrook | Cook County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 49.6 ±1.5 | 38.0 | no clear change |
| Under 18 years | 21.2% ±1.7 pts | 21.1% | – |
| 65 years and over | 26.6% ±1.9 pts | 16.0% | – |
| Male | 49.1% ±1.1 pts | 48.8% | – |
| Hispanic or Latino (any race) | 5.4% ±2.4 pts | 26.8% | +3.4 pts |
| White alone, not Hispanic | 73.8% ±3.4 pts | 40.1% | −4.5 pts |
| Black or African American alone, not Hispanic | 1.8% ±1.0 pts | 21.8% | no clear change |
| Asian alone, not Hispanic | 16.2% ±2.5 pts | 7.9% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.7% ±0.9 pts | 3.0% | – |
| Some other race alone, not Hispanic | 0.1% ±0.2 pts | 0.4% | – |
| Born outside the United States | 20.7% ±2.2 pts | 21.7% | no clear change |
| Speak a language other than English at home (age 5+) | 25.8% ±3.0 pts | 35.8% | – |
| Civilian veterans (age 18+) | 3.7% ±1.3 pts | 3.2% | – |
| With a disability | 8.5% ±1.2 pts | 11.4% | – |
| No health insurance coverage | 2.2% ±0.7 pts | 8.9% | +0.9 pts |
| High school graduate or higher (age 25+) | 97.2% ±0.9 pts | 88.6% | – |
| Bachelor's degree or higher (age 25+) | 72.6% ±3.6 pts | 42.7% | no clear change |
| Graduate or professional degree (age 25+) | 39.3% ±3.4 pts | 18.0% | – |
| Lived in the same house a year earlier | 91.9% ±1.9 pts | 88.4% | – |
| Moved from another state in the past year | 0.8% ±0.4 pts | 1.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Northbrook earn?
Half of Northbrook's 13,302 households earn less than $157,782 a year (±$19,596), against $83,498 in Cook County and $83,390 in Illinois. In 2015-2019 it was $153,668 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.3% of residents live below the poverty line.
| Measure | Northbrook | Cook County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $157,782 ±$19,596 | $83,498 | no clear change |
| Mean household income | $222,214 ±$16,083 | $120,717 | – |
| Per capita income | $87,173 ±$7,322 | $49,329 | no clear change |
| People below the poverty line | 4.3% ±1.3 pts | 13.5% | no clear change |
| Children under 18 below the poverty line | 3.3% ±2.5 pts | 17.9% | – |
| Households receiving SNAP | 2.0% ±0.9 pts | 15.7% | – |
| Households with a computer | 95.9% ±1.8 pts | 95.2% | – |
| Households with a broadband subscription | 94.7% ±1.8 pts | 90.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Northbrook?
Owners occupy 87.2% of Northbrook's occupied homes and renters 12.8%. The median owner-occupied home is valued at $652,300 by its owner (±$20,230). The median renter pays $2,463 a month including utilities, and 42.1% of renters pay 35% or more of their income on rent.
| Measure | Northbrook | Cook County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $652,300 ±$20,230 | $324,500 | no clear change |
| Median gross rent | $2,463 ±$303 | $1,435 | no clear change |
| Renters paying 35% or more of income on rent | 42.1% ±9.2 pts | 39.9% | no clear change |
| Median monthly owner costs, with a mortgage | $3,656 ±$182 | $2,270 | – |
| Owner-occupied homes | 87.2% ±2.0 pts | 57.7% | no clear change |
| Renter-occupied homes | 12.8% ±2.0 pts | 42.3% | – |
| Housing units | 14,435 ±538 | 2,276,493 | no clear change |
| Homeowner vacancy rate | 1.2% ±1.1 pts | 1.1% | – |
| Rental vacancy rate | 5.4% ±4.7 pts | 4.5% | – |
| Single-family detached homes | 67.2% ±3.0 pts | 39.6% | – |
| Mobile homes | 0.2% ±0.4 pts | 0.8% | – |
| Built 2020 or later | 1.3% ±0.7 pts | 0.7% | – |
| Built 2010 to 2019 | 9.6% ±2.1 pts | 4.4% | – |
| Built 1939 or earlier | 4.1% ±1.5 pts | 27.8% | – |
| Households with no vehicle | 5.3% ±1.7 pts | 18.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Northbrook building?
Builders took permits for 93 new housing units in Northbrook in 2025 (24 in single-family houses), 2.7 per 1,000 residents against 1.5 across Illinois.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Northbrook work and get to work?
53.8% of Northbrook's workers drive alone and 32.4% work from home. The average trip to work takes 26.8 minutes. The unemployment rate in 2020-2024 averaged 3.2%.
| Measure | Northbrook | Cook County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 59.2% ±2.3 pts | 66.2% | – |
| Unemployment rate | 3.2% ±1.0 pts | 7.0% | no clear change |
| Drove alone to work | 53.8% ±4.1 pts | 54.8% | – |
| Carpooled | 4.1% ±1.4 pts | 7.7% | – |
| Public transportation | 5.7% ±1.6 pts | 11.8% | – |
| Walked | 2.0% ±1.0 pts | 4.0% | – |
| Worked from home | 32.4% ±4.3 pts | 18.9% | +22.6 pts |
| Mean travel time to work | 26.8 min ±1.7 | 31.5 min | −3.8 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Northbrook?
7 census tracts lie mostly in Northbrook, and 4 more reach into it (2020 census blocks). Their median household incomes run from $105,313 (Tract 8016.01) to $237,695 (Tract 8017.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 8017.02Cook County | 4,950 | $177,394 |
| Tract 8016.05Cook County | 5,607 | $142,500 |
| Tract 8015Cook County | 6,219 | $154,083 |
| Tract 8016.06Cook County | 7,212 | $151,776 |
| Tract 8016.08Cook County | 6,318 | $145,417 |
| Tract 8016.01Cook County | 4,570 | $105,313 |
| Tract 8017.01Cook County | 3,469 | $237,695 |
| Tract 8018Cook County | 6,173 | $179,485 |
| Tract 8024.02Cook County | 5,739 | $78,942 |
| Tract 8023Cook County | 5,606 | $111,071 |
| Tract 8002Cook County | 6,347 | $248,893 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Northbrook) · Census block assignment files
How does Northbrook compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Northbrook is the 1,193rd-most populous of the 19,476 U.S. incorporated places that have one and the 54th-most populous of 1,294 in Illinois.
Northbrook ranks 45th of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 54th | 1,294 |
| Growth 2020-2025 (PEP) | 564th | 1,347 |
| Residents per square mile | 188th | 1,383 |
| Median household income | 45th | 1,380 |
| Per capita income | 33rd | 1,383 |
| Median home value | 27th | 1,379 |
| Median gross rent | 18th | 1,280 |
| Poverty rate | 1,010th | 1,119 |
| Bachelor's degree or higher | 25th | 1,369 |
| Median age | 93rd | 1,383 |
| Owner-occupied share | 286th | 1,382 |
| Work from home | 19th | 1,015 |
| Travel time to work | 577th | 1,382 |
Northbrook's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Northbrook with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Northbrook?
7 of the 57 figures for Northbrook on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Northbrook are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Northbrook.