Census tract · Cook County
Census Tract 3815, Cook County, Illinois
Census Tract 3815, GEOID 17031381500, in Cook County, Illinois, entirely within Chicago. 669 residents in the ACS 2020-2024 5-year estimates (±163); the 2020 Census counted 667.
Residents, 2020-2024
669
±163 (90% margin)
2020 Census count: 667
Median household income
$26,738
±$7,100 (90% margin)
Cook County: $83,498
Median home value
not published
Cook County: $324,500
Median gross rent
$1,013
±$161 (90% margin)
Cook County: $1,435
Where is Census Tract 3815?
Census Tract 3815 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.04 square miles of land, 15,881 residents per square mile in 2020. Its GEOID, 17031381500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 100% |
3 census tracts border Census Tract 3815: Tract 3814 ($47,931), Tract 8358 ($65,536) and Tract 8446 ($58,144). 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 3815?
The 2020-2024 American Community Survey puts Census Tract 3815's population at 669 (±163) in 401 households; the 2020 Census counted 667 residents and 397 housing units.
| Measure | Tract 3815 | Chicago |
|---|---|---|
| Total population | 669±163 | 2,711,226 |
| Households | 401±94 | 1,160,205 |
| Average household size | 1.67±0.19 | 2.29 |
| Housing units | 401±94 | 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 3815?
The median resident of Census Tract 3815 is 59.0 years old; 17.8% are under 18 and 33.5% are 65 or older. The largest group is non-Hispanic Black residents at 90.7%, then Hispanic or Latino residents (of any race) at 4.2%. 6.3% of residents were born outside the United States.
| Measure | Tract 3815 | Chicago |
|---|---|---|
| Median age | 59.0±17.1 | 35.8 |
| Under 18 years | 17.8%±7.1 pts | 19.4% |
| 65 years and over | 33.5%±13.4 pts | 13.8% |
| Hispanic or Latino (any race) | 4.2%±2.0 pts | 29.7% |
| White alone, not Hispanic | 4.0%±1.9 pts | 32.1% |
| Black or African American alone, not Hispanic | 90.7%±4.2 pts | 27.4% |
| Asian alone, not Hispanic | 1.0%±1.7 pts | 7.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±5.4 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±5.4 pts | 0.0% |
| Two or more races, not Hispanic | 0.0%±5.4 pts | 3.0% |
| Some other race alone, not Hispanic | 0.0%±5.4 pts | 0.4% |
| Born outside the United States | 6.3%±3.3 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 6.1%±2.9 pts | 35.4% |
| Civilian veterans (age 18+) | 1.1%±1.7 pts | 2.8% |
| With a disability | 29.0%±14.8 pts | 12.1% |
| No health insurance coverage | 5.2%±5.3 pts | 9.8% |
| High school graduate or higher (age 25+) | 94.4%±5.3 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 24.3%±14.3 pts | 44.3% |
| Graduate or professional degree (age 25+) | 8.4%±9.3 pts | 19.0% |
| Lived in the same house a year earlier | 96.0%±1.9 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 3815 earn?
Half of the 401 households in Census Tract 3815 earn less than $26,738 a year (±$7,100), against $83,498 across Cook County: 1,229th highest of the county's 1,258 tracts with a reliable estimate. 33.3% of residents live below the poverty line.
| Measure | Tract 3815 | Chicago |
|---|---|---|
| Median household income | $26,738±$7,100 | $77,902 |
| Mean household income | $51,169±$15,113 | $116,016 |
| Per capita income | $30,870±$9,585 | $50,086 |
| People below the poverty line | 33.3%±15.5 pts | 16.8% |
| Children under 18 below the poverty line | 65.5%±27.4 pts | 23.6% |
| Households receiving SNAP | 37.9%±16.2 pts | 18.9% |
| Households with a computer | 81.5%±13.5 pts | 94.9% |
| Households with a broadband subscription | 89.3%±8.6 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 3815?
Owners occupy 24.9% of Census Tract 3815's occupied homes and renters 75.1%. The median renter pays $1,013 a month including utilities, and 73.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 3815 | Chicago |
|---|---|---|
| Median gross rent | $1,013±$161 | $1,440 |
| Renters paying 35% or more of income on rent | 73.3%±12.2 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $3,034±$1,063 | $2,339 |
| Owner-occupied homes | 24.9%±12.7 pts | 46.0% |
| Renter-occupied homes | 75.1%±12.7 pts | 54.0% |
| Housing units | 401±94 | 1,277,054 |
| Single-family detached homes | 7.2%±7.5 pts | 25.6% |
| Mobile homes | 0.0%±8.9 pts | 0.2% |
| Built 2020 or later | 0.0%±8.9 pts | 0.8% |
| Built 2010 to 2019 | 5.0%±5.6 pts | 5.5% |
| Built 1939 or earlier | 49.4%±13.9 pts | 38.8% |
| Households with no vehicle | 41.4%±15.6 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 3815 get to work?
43.0% of Census Tract 3815's workers drive alone. The average trip to work takes 29.9 minutes.
| Measure | Tract 3815 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 51.8%±12.9 pts | 67.6% |
| Unemployment rate | 22.6%±20.5 pts | 8.0% |
| Drove alone to work | 43.0%±15.8 pts | 44.7% |
| Carpooled | 12.2%±5.6 pts | 7.3% |
| Public transportation | 34.3%±16.1 pts | 17.7% |
| Walked | 0.0%±15.0 pts | 5.8% |
| Worked from home | 0.0%±15.0 pts | 21.0% |
| Mean travel time to work | 29.9 min±7.3 | 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 3815 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 3815 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 1,327th of 1,328 | 788th of 789 |
| Residents per square mile | 430th of 1,331 | 404th of 792 |
| Median household income | 1,229th of 1,258 | 698th of 725 |
| Per capita income | 908th of 1,325 | 484th of 786 |
| Median gross rent | 1,143rd of 1,254 | 669th of 758 |
| Poverty rate | 111th of 905 | 100th of 587 |
| Bachelor's degree or higher | 889th of 1,264 | 496th of 736 |
| Median age | 9th of 1,327 | 6th of 788 |
| Owner-occupied share | 1,194th of 1,300 | 663rd of 762 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4914 | 1,226th | $27,381±$13,216 · within the margin of this tract |
| Tract 8415 | 1,227th | $27,029±$15,772 · within the margin of this tract |
| Tract 4408 | 1,228th | $26,890±$10,638 · within the margin of this tract |
| Tract 3815 | 1,229th | $26,738±$7,100 |
| Tract 8346 | 1,230th | $26,587±$14,144 · within the margin of this tract |
| Tract 6603.01 | 1,231st | $26,538±$6,646 · within the margin of this tract |
| Tract 3602 | 1,232nd | $26,143±$4,530 · 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 3815?
2 of the 17 figures for Census Tract 3815 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