Census tract · Cook County
Census Tract 8400, Cook County, Illinois
Census Tract 8400, GEOID 17031840000, in Cook County, Illinois, entirely within Chicago. 2,622 residents in the ACS 2020-2024 5-year estimates (±406); the 2020 Census counted 3,001.
Residents, 2020-2024
2,622
±406 (90% margin)
2020 Census count: 3,001
Median household income
$99,013
±$36,115 (90% margin)
Cook County: $83,498
Median home value
$525,600
±$62,218 (90% margin)
Cook County: $324,500
Median gross rent
$1,502
±$208 (90% margin)
Cook County: $1,435
Where is Census Tract 8400?
Census Tract 8400 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.22 square miles of land, 13,641 residents per square mile in 2020. Its GEOID, 17031840000, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 100% |
7 census tracts border Census Tract 8400: Tract 3403 ($53,030), Tract 3405 ($62,288), Tract 3406 ($21,279), Tract 8398 ($82,361), Tract 8399 ($108,194), Tract 8401 ($77,465) and Tract 8426 ($92,500). 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 8400?
The 2020-2024 American Community Survey puts Census Tract 8400's population at 2,622 (±406) in 1,019 households; the 2020 Census counted 3,001 residents and 1,190 housing units.
| Measure | Tract 8400 | Chicago |
|---|---|---|
| Total population | 2,622±406 | 2,711,226 |
| Households | 1,019±156 | 1,160,205 |
| Average household size | 2.57±0.22 | 2.29 |
| Housing units | 1,186±135 | 1,277,054 |
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 8400?
The median resident of Census Tract 8400 is 48.6 years old; 18.0% are under 18 and 24.9% are 65 or older. The largest group is non-Hispanic Asian residents at 45.9%, then non-Hispanic white residents at 36.6%. 38.5% of residents were born outside the United States.
| Measure | Tract 8400 | Chicago |
|---|---|---|
| Median age | 48.6±3.6 | 35.8 |
| Under 18 years | 18.0%±4.0 pts | 19.4% |
| 65 years and over | 24.9%±9.1 pts | 13.8% |
| Hispanic or Latino (any race) | 15.4%±5.9 pts | 29.7% |
| White alone, not Hispanic | 36.6%±8.9 pts | 32.1% |
| Black or African American alone, not Hispanic | 0.8%±1.3 pts | 27.4% |
| Asian alone, not Hispanic | 45.9%±9.8 pts | 7.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.4 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.4 pts | 0.0% |
| Two or more races, not Hispanic | 0.3%±0.7 pts | 3.0% |
| Some other race alone, not Hispanic | 1.0%±1.5 pts | 0.4% |
| Born outside the United States | 38.5%±8.9 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 56.1%±10.5 pts | 35.4% |
| Civilian veterans (age 18+) | 1.2%±1.6 pts | 2.8% |
| With a disability | 9.0%±8.9 pts | 12.1% |
| No health insurance coverage | 5.9%±4.3 pts | 9.8% |
| High school graduate or higher (age 25+) | 76.5%±12.2 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 25.7%±7.7 pts | 44.3% |
| Graduate or professional degree (age 25+) | 10.8%±4.8 pts | 19.0% |
| Lived in the same house a year earlier | 96.8%±2.7 pts | 86.0% |
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 8400 earn?
Half of the 1,019 households in Census Tract 8400 earn less than $99,013 a year (±$36,115), against $83,498 across Cook County: 419th highest of the county's 1,258 tracts with a reliable estimate. 19.9% of residents live below the poverty line.
| Measure | Tract 8400 | Chicago |
|---|---|---|
| Median household income | $99,013±$36,115 | $77,902 |
| Mean household income | $124,009±$29,056 | $116,016 |
| Per capita income | $48,158±$10,757 | $50,086 |
| People below the poverty line | 19.9%±12.9 pts | 16.8% |
| Children under 18 below the poverty line | 17.8%±17.7 pts | 23.6% |
| Households receiving SNAP | 11.1%±7.3 pts | 18.9% |
| Households with a computer | 91.6%±11.1 pts | 94.9% |
| Households with a broadband subscription | 97.6%±3.0 pts | 89.1% |
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 8400?
Owners occupy 61.7% of Census Tract 8400's occupied homes and renters 38.3%. The median owner-occupied home is valued at $525,600 by its owner (±$62,218). The median renter pays $1,502 a month including utilities.
| Measure | Tract 8400 | Chicago |
|---|---|---|
| Median home value (owner-occupied) | $525,600±$62,218 | $334,100 |
| Median gross rent | $1,502±$208 | $1,440 |
| Renters paying 35% or more of income on rent | 17.9%±15.3 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $2,873±$660 | $2,339 |
| Owner-occupied homes | 61.7%±13.6 pts | 46.0% |
| Renter-occupied homes | 38.3%±13.6 pts | 54.0% |
| Housing units | 1,186±135 | 1,277,054 |
| Single-family detached homes | 43.8%±8.8 pts | 25.6% |
| Mobile homes | 0.0%±3.1 pts | 0.2% |
| Built 2020 or later | 0.0%±3.1 pts | 0.8% |
| Built 2010 to 2019 | 8.3%±4.2 pts | 5.5% |
| Built 1939 or earlier | 33.6%±11.4 pts | 38.8% |
| Households with no vehicle | 1.3%±2.0 pts | 26.6% |
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 8400 get to work?
48.2% of Census Tract 8400's workers drive alone and 11.2% work from home. The average trip to work takes 24.9 minutes. The unemployment rate in 2020-2024 averaged 11.3%.
| Measure | Tract 8400 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 65.3%±11.8 pts | 67.6% |
| Unemployment rate | 11.3%±7.3 pts | 8.0% |
| Drove alone to work | 48.2%±10.2 pts | 44.7% |
| Carpooled | 17.5%±12.1 pts | 7.3% |
| Public transportation | 12.3%±7.4 pts | 17.7% |
| Walked | 0.5%±0.7 pts | 5.8% |
| Worked from home | 11.2%±5.5 pts | 21.0% |
| Mean travel time to work | 24.9 min±3.0 | 33.1 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 8400 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 8400 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 969th of 1,328 | 476th of 789 |
| Residents per square mile | 506th of 1,331 | 469th of 792 |
| Median household income | 419th of 1,258 | 199th of 725 |
| Per capita income | 494th of 1,325 | 282nd of 786 |
| Median home value | 196th of 1,279 | 133rd of 749 |
| Median gross rent | 493rd of 1,254 | 265th of 758 |
| Poverty rate | 319th of 905 | 262nd of 587 |
| Bachelor's degree or higher | 857th of 1,264 | 478th of 736 |
| Median age | 105th of 1,327 | 49th of 788 |
| Owner-occupied share | 604th of 1,300 | 198th of 762 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 404.02 | 416th | $99,201±$14,332 · within the margin of this tract |
| Tract 8054.02 | 417th | $99,184±$11,109 · within the margin of this tract |
| Tract 8174 | 418th | $99,018±$18,198 · within the margin of this tract |
| Tract 8400 | 419th | $99,013±$36,115 |
| Tract 304 | 420th | $98,909±$16,107 · within the margin of this tract |
| Tract 8293.01 | 421st | $98,777±$20,459 · within the margin of this tract |
| Tract 2410 | 422nd | $98,304±$28,708 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
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 8400?
1 of the 18 figures for Census Tract 8400 on this page carries a coefficient of variation over 40% and is 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