Census tract · Cook County
Census Tract 8004, Cook County, Illinois
Census Tract 8004, GEOID 17031800400, in Cook County, Illinois, mostly within Winnetka (99% of its census blocks). 3,799 residents in the ACS 2020-2024 5-year estimates (±355); the 2020 Census counted 3,936.
Residents, 2020-2024
3,799
±355 (90% margin)
2020 Census count: 3,936
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
Cook County: $83,498
Median home value
$1,458,100
±$133,784 (90% margin)
Cook County: $324,500
Median gross rent
$2,413
±$2,306 (90% margin)
Cook County: $1,435
Where is Census Tract 8004?
Census Tract 8004 is one of 1,332 census tracts in Cook County, Illinois. It covers 1.15 square miles of land, 3,438 residents per square mile in 2020. Its GEOID, 17031800400, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Winnetka | 99% |
| New Trier Township | 99% |
4 census tracts border Census Tract 8004: Tract 8001 ($249,167), Tract 8003 ($250,000 or more), Tract 8005 ($250,000 or more) and Tract 8006 ($250,000 or more). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 8004?
The 2020-2024 American Community Survey puts Census Tract 8004's population at 3,799 (±355) in 1,265 households; the 2020 Census counted 3,936 residents and 1,368 housing units.
| Measure | Tract 8004 | Winnetka |
|---|---|---|
| Total population | 3,799±355 | 12,484 |
| Households | 1,265±112 | 4,172 |
| Average household size | 3.00±0.17 | 2.99 |
| Housing units | 1,386±102 | 4,539 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 8004?
The median resident of Census Tract 8004 is 40.5 years old; 36.1% are under 18 and 14.8% are 65 or older. The largest group is non-Hispanic white residents at 87.5%, then Hispanic or Latino residents (of any race) at 7.0%. 7.1% of residents were born outside the United States.
| Measure | Tract 8004 | Winnetka |
|---|---|---|
| Median age | 40.5±4.0 | 41.5 |
| Under 18 years | 36.1%±3.0 pts | 34.5% |
| 65 years and over | 14.8%±2.9 pts | 15.9% |
| Hispanic or Latino (any race) | 7.0%±5.3 pts | 3.6% |
| White alone, not Hispanic | 87.5%±6.0 pts | 88.2% |
| Black or African American alone, not Hispanic | 0.0%±1.0 pts | 0.3% |
| Asian alone, not Hispanic | 2.2%±1.4 pts | 2.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.0 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.0 pts | 0.1% |
| Two or more races, not Hispanic | 3.0%±2.0 pts | 4.8% |
| Some other race alone, not Hispanic | 0.3%±0.5 pts | 0.5% |
| Born outside the United States | 7.1%±3.0 pts | 7.1% |
| Speak a language other than English at home (age 5+) | 8.9%±4.8 pts | 10.5% |
| Civilian veterans (age 18+) | 2.3%±1.5 pts | 3.6% |
| With a disability | 5.7%±2.6 pts | 6.6% |
| No health insurance coverage | 0.4%±0.7 pts | 1.6% |
| High school graduate or higher (age 25+) | 99.7%±0.5 pts | 99.1% |
| Bachelor's degree or higher (age 25+) | 90.1%±3.2 pts | 86.7% |
| Graduate or professional degree (age 25+) | 59.1%±7.9 pts | 51.3% |
| Lived in the same house a year earlier | 90.4%±5.3 pts | 91.5% |
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 Census Tract 8004 earn?
Half of the 1,265 households in Census Tract 8004 earn less than $250,000 or more a year (), against $83,498 across Cook County: 1st highest of the county's 1,258 tracts with a reliable estimate.
| Measure | Tract 8004 | Winnetka |
|---|---|---|
| Median household income | $250,000 or more | $250,000 or more |
| Mean household income | $550,752±$116,453 | $484,635 |
| Per capita income | $182,666±$40,272 | $162,186 |
| People below the poverty line | 1.3%±1.2 pts | 1.6% |
| Children under 18 below the poverty line | 0.0%±2.7 pts | 0.3% |
| Households receiving SNAP | 0.6%±1.0 pts | 0.3% |
| Households with a computer | 100.0%±2.9 pts | 98.3% |
| Households with a broadband subscription | 99.2%±1.3 pts | 98.0% |
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 Census Tract 8004?
Owners occupy 91.5% of Census Tract 8004's occupied homes and renters 8.5%. The median owner-occupied home is valued at $1,458,100 by its owner (±$133,784).
| Measure | Tract 8004 | Winnetka |
|---|---|---|
| Median home value (owner-occupied) | $1,458,100±$133,784 | $1,337,800 |
| Median gross rent | $2,413±$2,306 | $1,842 |
| Renters paying 35% or more of income on rent | 38.9%±36.9 pts | 56.8% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 91.5%±4.5 pts | 92.0% |
| Renter-occupied homes | 8.5%±4.5 pts | 8.0% |
| Housing units | 1,386±102 | 4,539 |
| Single-family detached homes | 91.8%±3.2 pts | 88.5% |
| Mobile homes | 0.0%±2.7 pts | 0.0% |
| Built 2020 or later | 2.3%±2.4 pts | 1.3% |
| Built 2010 to 2019 | 4.7%±3.0 pts | 5.9% |
| Built 1939 or earlier | 57.4%±7.5 pts | 48.8% |
| Households with no vehicle | 3.0%±2.4 pts | 2.7% |
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 do people in Census Tract 8004 get to work?
49.4% of Census Tract 8004's workers drive alone and 24.7% work from home. The average trip to work takes 35.7 minutes.
| Measure | Tract 8004 | Winnetka |
|---|---|---|
| In the labor force (age 16+) | 57.6%±4.3 pts | 59.0% |
| Unemployment rate | 2.8%±2.4 pts | 3.4% |
| Drove alone to work | 49.4%±8.1 pts | 45.2% |
| Carpooled | 1.2%±1.8 pts | 3.0% |
| Public transportation | 18.5%±6.1 pts | 16.5% |
| Walked | 1.0%±1.4 pts | 1.8% |
| Worked from home | 24.7%±6.4 pts | 29.2% |
| Mean travel time to work | 35.7 min±4.2 | 32.6 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
How does Census Tract 8004 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 8004 ranks as shown below (1 = highest).
| Measure | In Cook County | In Winnetka |
|---|---|---|
| Population | 657th of 1,328 | 2nd of 3 |
| Residents per square mile | 1,148th of 1,331 | 2nd of 3 |
| Median household income | 1st of 1,258 | 1st of 3 |
| Per capita income | 1st of 1,325 | 1st of 3 |
| Median home value | 4th of 1,279 | 1st of 3 |
| Bachelor's degree or higher | 31st of 1,264 | 1st of 3 |
| Median age | 498th of 1,327 | 3rd of 3 |
| Owner-occupied share | 106th of 1,300 | 2nd of 3 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 623 | 1st | $250,000 or more |
| Tract 8003 | 1st | $250,000 or more |
| Tract 8004 | 1st | $250,000 or more |
| Tract 8005 | 1st | $250,000 or more |
| Tract 8006 | 1st | $250,000 or more |
| Tract 8007 | 1st | $250,000 or more |
| Tract 8200 | 1st | $250,000 or more |
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 8004?
4 of the 18 figures for Census Tract 8004 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.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections