Census tract · Cook County
Census Tract 3105, Cook County, Illinois
Census Tract 3105, GEOID 17031310500, in Cook County, Illinois, entirely within Chicago. 1,356 residents in the ACS 2020-2024 5-year estimates (±306); the 2020 Census counted 1,399.
Residents, 2020-2024
1,356
±306 (90% margin)
2020 Census count: 1,399
Median household income
$63,070
±$24,909 (90% margin)
Cook County: $83,498
Median home value
$407,500
±$59,690 (90% margin)
Cook County: $324,500
Median gross rent
$1,288
±$322 (90% margin)
Cook County: $1,435
Where is Census Tract 3105?
Census Tract 3105 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.06 square miles of land, 22,206 residents per square mile in 2020. Its GEOID, 17031310500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 100% |
3 census tracts border Census Tract 3105: Tract 3104 ($83,271), Tract 3106 ($86,938) and Tract 8432 ($74,764). 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 3105?
The 2020-2024 American Community Survey puts Census Tract 3105's population at 1,356 (±306) in 682 households; the 2020 Census counted 1,399 residents and 709 housing units.
| Measure | Tract 3105 | Chicago |
|---|---|---|
| Total population | 1,356±306 | 2,711,226 |
| Households | 682±119 | 1,160,205 |
| Average household size | 1.99±0.30 | 2.29 |
| Housing units | 741±118 | 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 3105?
The median resident of Census Tract 3105 is 35.4 years old. The largest group is Hispanic or Latino residents (of any race) at 68.7%, then non-Hispanic white residents at 24.0%. 53.2% of residents were born outside the United States.
| Measure | Tract 3105 | Chicago |
|---|---|---|
| Median age | 35.4±2.9 | 35.8 |
| Under 18 years | 5.2%±4.1 pts | 19.4% |
| 65 years and over | 18.7%±7.3 pts | 13.8% |
| Hispanic or Latino (any race) | 68.7%±13.9 pts | 29.7% |
| White alone, not Hispanic | 24.0%±12.4 pts | 32.1% |
| Black or African American alone, not Hispanic | 4.9%±5.1 pts | 27.4% |
| Asian alone, not Hispanic | 2.3%±2.5 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 | 53.2%±13.5 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 72.3%±11.7 pts | 35.4% |
| Civilian veterans (age 18+) | 2.3%±3.8 pts | 2.8% |
| With a disability | 7.4%±5.1 pts | 12.1% |
| No health insurance coverage | 23.2%±12.3 pts | 9.8% |
| High school graduate or higher (age 25+) | 81.5%±10.6 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 33.2%±10.4 pts | 44.3% |
| Graduate or professional degree (age 25+) | 19.2%±9.0 pts | 19.0% |
| Lived in the same house a year earlier | 87.0%±9.0 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 3105 earn?
Half of the 682 households in Census Tract 3105 earn less than $63,070 a year (±$24,909), against $83,498 across Cook County: 905th highest of the county's 1,258 tracts with a reliable estimate. 17.1% of residents live below the poverty line.
| Measure | Tract 3105 | Chicago |
|---|---|---|
| Median household income | $63,070±$24,909 | $77,902 |
| Mean household income | $76,877±$15,400 | $116,016 |
| Per capita income | $37,812±$9,035 | $50,086 |
| People below the poverty line | 17.1%±11.1 pts | 16.8% |
| Children under 18 below the poverty line | 0.0%±38.1 pts | 23.6% |
| Households receiving SNAP | 15.1%±13.7 pts | 18.9% |
| Households with a computer | 100.0%±5.3 pts | 94.9% |
| Households with a broadband subscription | 92.8%±6.3 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 3105?
Owners occupy 33.3% of Census Tract 3105's occupied homes and renters 66.7%. The median owner-occupied home is valued at $407,500 by its owner (±$59,690). The median renter pays $1,288 a month including utilities, and 30.8% of renters pay 35% or more of their income on rent.
| Measure | Tract 3105 | Chicago |
|---|---|---|
| Median home value (owner-occupied) | $407,500±$59,690 | $334,100 |
| Median gross rent | $1,288±$322 | $1,440 |
| Renters paying 35% or more of income on rent | 30.8%±15.6 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $1,995±$881 | $2,339 |
| Owner-occupied homes | 33.3%±14.1 pts | 46.0% |
| Renter-occupied homes | 66.7%±14.1 pts | 54.0% |
| Housing units | 741±118 | 1,277,054 |
| Single-family detached homes | 18.1%±13.6 pts | 25.6% |
| Mobile homes | 0.0%±4.9 pts | 0.2% |
| Built 2020 or later | 0.0%±4.9 pts | 0.8% |
| Built 2010 to 2019 | 3.4%±3.6 pts | 5.5% |
| Built 1939 or earlier | 46.8%±14.5 pts | 38.8% |
| Households with no vehicle | 25.1%±12.8 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 3105 get to work?
33.6% of Census Tract 3105's workers drive alone. The average trip to work takes 27.3 minutes.
| Measure | Tract 3105 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 76.4%±9.2 pts | 67.6% |
| Unemployment rate | 9.6%±9.4 pts | 8.0% |
| Drove alone to work | 33.6%±12.3 pts | 44.7% |
| Carpooled | 5.5%±5.6 pts | 7.3% |
| Public transportation | 37.9%±15.5 pts | 17.7% |
| Walked | 0.0%±4.3 pts | 5.8% |
| Worked from home | 9.0%±7.8 pts | 21.0% |
| Mean travel time to work | 27.3 min±3.9 | 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 3105 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 3105 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 1,264th of 1,328 | 730th of 789 |
| Residents per square mile | 261st of 1,331 | 255th of 792 |
| Median household income | 905th of 1,258 | 459th of 725 |
| Per capita income | 714th of 1,325 | 382nd of 786 |
| Median home value | 373rd of 1,279 | 243rd of 749 |
| Median gross rent | 775th of 1,254 | 434th of 758 |
| Poverty rate | 390th of 905 | 315th of 587 |
| Bachelor's degree or higher | 719th of 1,264 | 408th of 736 |
| Median age | 871st of 1,327 | 425th of 788 |
| Owner-occupied share | 1,085th of 1,300 | 565th of 762 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 105.02 | 902nd | $63,125±$11,481 · within the margin of this tract |
| Tract 6715 | 902nd | $63,125±$25,270 · within the margin of this tract |
| Tract 8285.08 | 904th | $63,107±$15,815 · within the margin of this tract |
| Tract 3105 | 905th | $63,070±$24,909 |
| Tract 8172 | 906th | $63,067±$21,530 · within the margin of this tract |
| Tract 102.01 | 907th | $63,056±$21,160 · within the margin of this tract |
| Tract 8237.03 | 908th | $63,005±$14,237 · 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 3105?
3 of the 18 figures for Census Tract 3105 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