Census tract · Cook County
Census Tract 4109, Cook County, Illinois
Census Tract 4109, GEOID 17031410900, in Cook County, Illinois, mostly within Chicago (95% of its census blocks). 3,693 residents in the ACS 2020-2024 5-year estimates (±528); the 2020 Census counted 3,670.
Residents, 2020-2024
3,693
±528 (90% margin)
2020 Census count: 3,670
Median household income
$73,828
±$11,431 (90% margin)
Cook County: $83,498
Median home value
$344,600
±$19,372 (90% margin)
Cook County: $324,500
Median gross rent
$1,719
±$172 (90% margin)
Cook County: $1,435
Where is Census Tract 4109?
Census Tract 4109 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.15 square miles of land, 24,467 residents per square mile in 2020. Its GEOID, 17031410900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 95% |
3 census tracts border Census Tract 4109: Tract 4101 ($63,931), Tract 4108 ($71,989) and Tract 4110 ($70,893). 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 4109?
The 2020-2024 American Community Survey puts Census Tract 4109's population at 3,693 (±528) in 2,062 households; the 2020 Census counted 3,670 residents and 2,272 housing units.
| Measure | Tract 4109 | Chicago |
|---|---|---|
| Total population | 3,693±528 | 2,711,226 |
| Households | 2,062±181 | 1,160,205 |
| Average household size | 1.75±0.16 | 2.29 |
| Housing units | 2,090±178 | 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 4109?
The median resident of Census Tract 4109 is 39.8 years old; 10.8% are under 18 and 20.3% are 65 or older. The largest group is non-Hispanic white residents at 48.7%, then non-Hispanic Black residents at 19.4%. 20.3% of residents were born outside the United States.
| Measure | Tract 4109 | Chicago |
|---|---|---|
| Median age | 39.8±7.1 | 35.8 |
| Under 18 years | 10.8%±3.1 pts | 19.4% |
| 65 years and over | 20.3%±6.8 pts | 13.8% |
| Hispanic or Latino (any race) | 14.1%±9.0 pts | 29.7% |
| White alone, not Hispanic | 48.7%±10.3 pts | 32.1% |
| Black or African American alone, not Hispanic | 19.4%±6.7 pts | 27.4% |
| Asian alone, not Hispanic | 12.7%±5.7 pts | 7.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.0 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.0 pts | 0.0% |
| Two or more races, not Hispanic | 4.6%±4.0 pts | 3.0% |
| Some other race alone, not Hispanic | 0.6%±0.9 pts | 0.4% |
| Born outside the United States | 20.3%±6.8 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 28.2%±9.3 pts | 35.4% |
| Civilian veterans (age 18+) | 3.8%±3.3 pts | 2.8% |
| With a disability | 17.5%±8.5 pts | 12.1% |
| No health insurance coverage | 3.9%±3.4 pts | 9.8% |
| High school graduate or higher (age 25+) | 97.2%±3.5 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 84.8%±7.3 pts | 44.3% |
| Graduate or professional degree (age 25+) | 53.4%±9.8 pts | 19.0% |
| Lived in the same house a year earlier | 81.4%±6.9 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 4109 earn?
Half of the 2,062 households in Census Tract 4109 earn less than $73,828 a year (±$11,431), against $83,498 across Cook County: 752nd highest of the county's 1,258 tracts with a reliable estimate. 9.8% of residents live below the poverty line.
| Measure | Tract 4109 | Chicago |
|---|---|---|
| Median household income | $73,828±$11,431 | $77,902 |
| Mean household income | $103,118±$17,742 | $116,016 |
| Per capita income | $57,431±$8,116 | $50,086 |
| People below the poverty line | 9.8%±3.8 pts | 16.8% |
| Children under 18 below the poverty line | 0.0%±9.0 pts | 23.6% |
| Households receiving SNAP | 2.4%±2.5 pts | 18.9% |
| Households with a computer | 95.9%±3.2 pts | 94.9% |
| Households with a broadband subscription | 95.6%±3.2 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 4109?
Owners occupy 38.9% of Census Tract 4109's occupied homes and renters 61.1%. The median owner-occupied home is valued at $344,600 by its owner (±$19,372). The median renter pays $1,719 a month including utilities, and 55.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 4109 | Chicago |
|---|---|---|
| Median home value (owner-occupied) | $344,600±$19,372 | $334,100 |
| Median gross rent | $1,719±$172 | $1,440 |
| Renters paying 35% or more of income on rent | 55.0%±12.3 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $2,439±$689 | $2,339 |
| Owner-occupied homes | 38.9%±8.6 pts | 46.0% |
| Renter-occupied homes | 61.1%±8.6 pts | 54.0% |
| Housing units | 2,090±178 | 1,277,054 |
| Single-family detached homes | 0.0%±1.8 pts | 25.6% |
| Mobile homes | 0.0%±1.8 pts | 0.2% |
| Built 2020 or later | 0.0%±1.8 pts | 0.8% |
| Built 2010 to 2019 | 0.0%±1.8 pts | 5.5% |
| Built 1939 or earlier | 71.9%±7.6 pts | 38.8% |
| Households with no vehicle | 35.1%±9.2 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 4109 get to work?
25.5% of Census Tract 4109's workers drive alone and 28.6% work from home. The average trip to work takes 31.4 minutes. The unemployment rate in 2020-2024 averaged 11.0%.
| Measure | Tract 4109 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 69.2%±7.9 pts | 67.6% |
| Unemployment rate | 11.0%±6.0 pts | 8.0% |
| Drove alone to work | 25.5%±8.6 pts | 44.7% |
| Carpooled | 1.2%±1.9 pts | 7.3% |
| Public transportation | 25.9%±9.8 pts | 17.7% |
| Walked | 9.4%±5.3 pts | 5.8% |
| Worked from home | 28.6%±10.5 pts | 21.0% |
| Mean travel time to work | 31.4 min±4.8 | 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 4109 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 4109 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 690th of 1,328 | 304th of 789 |
| Residents per square mile | 205th of 1,331 | 200th of 792 |
| Median household income | 752nd of 1,258 | 371st of 725 |
| Per capita income | 350th of 1,325 | 216th of 786 |
| Median home value | 543rd of 1,279 | 345th of 749 |
| Median gross rent | 319th of 1,254 | 167th of 758 |
| Poverty rate | 638th of 905 | 463rd of 587 |
| Bachelor's degree or higher | 84th of 1,264 | 67th of 736 |
| Median age | 549th of 1,327 | 236th of 788 |
| Owner-occupied share | 1,006th of 1,300 | 495th of 762 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 8183 | 749th | $73,929±$18,528 · within the margin of this tract |
| Tract 1405 | 750th | $73,889±$31,728 · within the margin of this tract |
| Tract 8047.15 | 751st | $73,864±$11,087 · within the margin of this tract |
| Tract 4109 | 752nd | $73,828±$11,431 |
| Tract 6203 | 753rd | $73,804±$17,588 · within the margin of this tract |
| Tract 204 | 754th | $73,790±$26,057 · within the margin of this tract |
| Tract 5001 | 755th | $73,780±$22,816 · 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 4109?
Every figure for Census Tract 4109 on this page has a coefficient of variation under 40%, the Census Bureau's threshold for a usable estimate.
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