Census tract · Cook County
Census Tract 8431, Cook County, Illinois
Census Tract 8431, GEOID 17031843100, in Cook County, Illinois, entirely within Chicago. 1,381 residents in the ACS 2020-2024 5-year estimates (±347); the 2020 Census counted 1,747.
Residents, 2020-2024
1,381
±347 (90% margin)
2020 Census count: 1,747
Median household income
$51,023
±$41,139 (90% margin)
Cook County: $83,498
Median home value
$381,600
±$153,934 (90% margin)
Cook County: $324,500
Median gross rent
$1,371
±$155 (90% margin)
Cook County: $1,435
Where is Census Tract 8431?
Census Tract 8431 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.38 square miles of land, 4,622 residents per square mile in 2020. Its GEOID, 17031843100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 100% |
7 census tracts border Census Tract 8431: Tract 2916, Tract 8386 ($20,725), Tract 8407 ($106,840), Tract 8415 ($27,029), Tract 8417 ($67,560), Tract 8433 ($83,393) and Tract 8447 ($60,250). 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 8431?
The 2020-2024 American Community Survey puts Census Tract 8431's population at 1,381 (±347) in 493 households; the 2020 Census counted 1,747 residents and 720 housing units.
| Measure | Tract 8431 | Chicago |
|---|---|---|
| Total population | 1,381±347 | 2,711,226 |
| Households | 493±72 | 1,160,205 |
| Average household size | 2.53±0.61 | 2.29 |
| Housing units | 639±38 | 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 8431?
The median resident of Census Tract 8431 is 42.8 years old; 21.5% are under 18 and 8.7% are 65 or older. The largest group is non-Hispanic Black residents at 82.5%, then non-Hispanic white residents at 8.9%.
| Measure | Tract 8431 | Chicago |
|---|---|---|
| Median age | 42.8±5.8 | 35.8 |
| Under 18 years | 21.5%±7.9 pts | 19.4% |
| 65 years and over | 8.7%±4.6 pts | 13.8% |
| Hispanic or Latino (any race) | 7.2%±6.7 pts | 29.7% |
| White alone, not Hispanic | 8.9%±4.1 pts | 32.1% |
| Black or African American alone, not Hispanic | 82.5%±9.3 pts | 27.4% |
| Asian alone, not Hispanic | 1.4%±1.5 pts | 7.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±2.7 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±2.7 pts | 0.0% |
| Two or more races, not Hispanic | 0.0%±2.7 pts | 3.0% |
| Some other race alone, not Hispanic | 0.0%±2.7 pts | 0.4% |
| Born outside the United States | 5.6%±4.7 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 14.3%±9.7 pts | 35.4% |
| Civilian veterans (age 18+) | 0.0%±3.4 pts | 2.8% |
| With a disability | 19.6%±6.4 pts | 12.1% |
| No health insurance coverage | 18.8%±12.1 pts | 9.8% |
| High school graduate or higher (age 25+) | 84.5%±7.5 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 30.7%±11.0 pts | 44.3% |
| Graduate or professional degree (age 25+) | 16.6%±9.5 pts | 19.0% |
| Lived in the same house a year earlier | 88.2%±7.3 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 8431 earn?
The median household income for Census Tract 8431 is published as $51,023 with a margin of ±$41,139, too wide to rely on. 32.4% of residents live below the poverty line.
| Measure | Tract 8431 | Chicago |
|---|---|---|
| Median household income | $51,023±$41,139 | $77,902 |
| Mean household income | $104,548±$41,655 | $116,016 |
| Per capita income | $39,082±$14,770 | $50,086 |
| People below the poverty line | 32.4%±14.6 pts | 16.8% |
| Children under 18 below the poverty line | 43.1%±31.5 pts | 23.6% |
| Households receiving SNAP | 42.4%±17.2 pts | 18.9% |
| Households with a computer | 93.1%±10.8 pts | 94.9% |
| Households with a broadband subscription | 81.5%±14.1 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 8431?
Owners occupy 30.6% of Census Tract 8431's occupied homes and renters 69.4%. The median owner-occupied home is valued at $381,600 by its owner (±$153,934). The median renter pays $1,371 a month including utilities, and 54.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 8431 | Chicago |
|---|---|---|
| Median home value (owner-occupied) | $381,600±$153,934 | $334,100 |
| Median gross rent | $1,371±$155 | $1,440 |
| Renters paying 35% or more of income on rent | 54.0%±18.8 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $2,315±$504 | $2,339 |
| Owner-occupied homes | 30.6%±13.6 pts | 46.0% |
| Renter-occupied homes | 69.4%±13.6 pts | 54.0% |
| Housing units | 639±38 | 1,277,054 |
| Single-family detached homes | 8.8%±8.3 pts | 25.6% |
| Mobile homes | 0.0%±5.7 pts | 0.2% |
| Built 2020 or later | 0.0%±5.7 pts | 0.8% |
| Built 2010 to 2019 | 0.0%±5.7 pts | 5.5% |
| Built 1939 or earlier | 77.6%±12.2 pts | 38.8% |
| Households with no vehicle | 30.8%±14.7 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 8431 get to work?
66.1% of Census Tract 8431's workers drive alone and 15.5% work from home. The average trip to work takes 38.1 minutes.
| Measure | Tract 8431 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 52.7%±10.5 pts | 67.6% |
| Unemployment rate | 5.5%±7.0 pts | 8.0% |
| Drove alone to work | 66.1%±15.1 pts | 44.7% |
| Carpooled | 6.1%±5.9 pts | 7.3% |
| Public transportation | 12.3%±11.8 pts | 17.7% |
| Walked | 0.0%±7.1 pts | 5.8% |
| Worked from home | 15.5%±9.8 pts | 21.0% |
| Mean travel time to work | 38.1 min±13.6 | 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 8431 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 8431 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 1,260th of 1,328 | 726th of 789 |
| Residents per square mile | 1,044th of 1,331 | 750th of 792 |
| Per capita income | 691st of 1,325 | 368th of 786 |
| Median home value | 437th of 1,279 | 282nd of 749 |
| Median gross rent | 663rd of 1,254 | 362nd of 758 |
| Poverty rate | 124th of 905 | 111th of 587 |
| Bachelor's degree or higher | 764th of 1,264 | 433rd of 736 |
| Median age | 330th of 1,327 | 141st of 788 |
| Owner-occupied share | 1,126th of 1,300 | 603rd of 762 |
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 8431?
3 of the 18 figures for Census Tract 8431 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