Census tract · Cook County
Census Tract 309, Cook County, Illinois
Census Tract 309, GEOID 17031030900, in Cook County, Illinois, entirely within Chicago. 2,818 residents in the ACS 2020-2024 5-year estimates (±335); the 2020 Census counted 2,952.
Residents, 2020-2024
2,818
±335 (90% margin)
2020 Census count: 2,952
Median household income
$87,485
±$21,521 (90% margin)
Cook County: $83,498
Median home value
$444,300
±$106,575 (90% margin)
Cook County: $324,500
Median gross rent
$1,548
±$156 (90% margin)
Cook County: $1,435
Where is Census Tract 309?
Census Tract 309 is one of 1,332 census tracts in Cook County, Illinois. It covers 0.16 square miles of land, 18,684 residents per square mile in 2020. Its GEOID, 17031030900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Chicago | 100% |
4 census tracts border Census Tract 309: Tract 304 ($98,909), Tract 308 ($105,585), Tract 310 ($132,147) and Tract 401 ($90,952). 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 309?
The 2020-2024 American Community Survey puts Census Tract 309's population at 2,818 (±335) in 1,519 households; the 2020 Census counted 2,952 residents and 1,614 housing units.
| Measure | Tract 309 | Chicago |
|---|---|---|
| Total population | 2,818±335 | 2,711,226 |
| Households | 1,519±206 | 1,160,205 |
| Average household size | 1.85±0.14 | 2.29 |
| Housing units | 1,738±185 | 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 309?
The median resident of Census Tract 309 is 39.6 years old; 10.4% are under 18 and 10.0% are 65 or older. The largest group is non-Hispanic white residents at 68.3%, then Hispanic or Latino residents (of any race) at 19.8%. 14.5% of residents were born outside the United States.
| Measure | Tract 309 | Chicago |
|---|---|---|
| Median age | 39.6±2.8 | 35.8 |
| Under 18 years | 10.4%±3.8 pts | 19.4% |
| 65 years and over | 10.0%±3.5 pts | 13.8% |
| Hispanic or Latino (any race) | 19.8%±6.9 pts | 29.7% |
| White alone, not Hispanic | 68.3%±9.8 pts | 32.1% |
| Black or African American alone, not Hispanic | 2.4%±2.5 pts | 27.4% |
| Asian alone, not Hispanic | 3.4%±3.4 pts | 7.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.2%±0.3 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.3 pts | 0.0% |
| Two or more races, not Hispanic | 5.4%±3.2 pts | 3.0% |
| Some other race alone, not Hispanic | 0.5%±0.7 pts | 0.4% |
| Born outside the United States | 14.5%±5.9 pts | 20.9% |
| Speak a language other than English at home (age 5+) | 17.7%±7.8 pts | 35.4% |
| Civilian veterans (age 18+) | 1.7%±1.4 pts | 2.8% |
| With a disability | 9.5%±3.8 pts | 12.1% |
| No health insurance coverage | 6.0%±3.8 pts | 9.8% |
| High school graduate or higher (age 25+) | 93.3%±4.5 pts | 87.2% |
| Bachelor's degree or higher (age 25+) | 64.6%±7.9 pts | 44.3% |
| Graduate or professional degree (age 25+) | 28.7%±8.0 pts | 19.0% |
| Lived in the same house a year earlier | 81.8%±6.7 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 309 earn?
Half of the 1,519 households in Census Tract 309 earn less than $87,485 a year (±$21,521), against $83,498 across Cook County: 537th highest of the county's 1,258 tracts with a reliable estimate. 5.4% of residents live below the poverty line.
| Measure | Tract 309 | Chicago |
|---|---|---|
| Median household income | $87,485±$21,521 | $77,902 |
| Mean household income | $123,507±$20,842 | $116,016 |
| Per capita income | $66,294±$9,411 | $50,086 |
| People below the poverty line | 5.4%±3.0 pts | 16.8% |
| Children under 18 below the poverty line | 0.0%±12.8 pts | 23.6% |
| Households receiving SNAP | 1.6%±1.7 pts | 18.9% |
| Households with a computer | 97.4%±2.1 pts | 94.9% |
| Households with a broadband subscription | 94.3%±3.8 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 309?
Owners occupy 39.0% of Census Tract 309's occupied homes and renters 61.0%. The median owner-occupied home is valued at $444,300 by its owner (±$106,575). The median renter pays $1,548 a month including utilities, and 36.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 309 | Chicago |
|---|---|---|
| Median home value (owner-occupied) | $444,300±$106,575 | $334,100 |
| Median gross rent | $1,548±$156 | $1,440 |
| Renters paying 35% or more of income on rent | 36.3%±13.9 pts | 39.3% |
| Median monthly owner costs, with a mortgage | $3,014±$733 | $2,339 |
| Owner-occupied homes | 39.0%±9.4 pts | 46.0% |
| Renter-occupied homes | 61.0%±9.4 pts | 54.0% |
| Housing units | 1,738±185 | 1,277,054 |
| Single-family detached homes | 11.7%±5.0 pts | 25.6% |
| Mobile homes | 0.0%±2.1 pts | 0.2% |
| Built 2020 or later | 0.0%±2.1 pts | 0.8% |
| Built 2010 to 2019 | 4.2%±4.5 pts | 5.5% |
| Built 1939 or earlier | 71.7%±7.7 pts | 38.8% |
| Households with no vehicle | 14.0%±5.3 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 309 get to work?
32.9% of Census Tract 309's workers drive alone and 43.2% work from home. The average trip to work takes 31.1 minutes.
| Measure | Tract 309 | Chicago |
|---|---|---|
| In the labor force (age 16+) | 82.7%±6.0 pts | 67.6% |
| Unemployment rate | 2.6%±1.8 pts | 8.0% |
| Drove alone to work | 32.9%±8.9 pts | 44.7% |
| Carpooled | 7.1%±5.0 pts | 7.3% |
| Public transportation | 10.5%±4.9 pts | 17.7% |
| Walked | 4.0%±3.2 pts | 5.8% |
| Worked from home | 43.2%±10.2 pts | 21.0% |
| Mean travel time to work | 31.1 min±3.7 | 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 309 compare with the other tracts in Cook County?
Among Cook County's tracts with a reliable estimate, Census Tract 309 ranks as shown below (1 = highest).
| Measure | In Cook County | In Chicago |
|---|---|---|
| Population | 923rd of 1,328 | 449th of 789 |
| Residents per square mile | 347th of 1,331 | 333rd of 792 |
| Median household income | 537th of 1,258 | 260th of 725 |
| Per capita income | 267th of 1,325 | 178th of 786 |
| Median home value | 293rd of 1,279 | 193rd of 749 |
| Median gross rent | 462nd of 1,254 | 248th of 758 |
| Poverty rate | 818th of 905 | 560th of 587 |
| Bachelor's degree or higher | 281st of 1,264 | 196th of 736 |
| Median age | 570th of 1,327 | 246th of 788 |
| Owner-occupied share | 1,004th of 1,300 | 493rd of 762 |
The tracts next to it on Cook County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 1608 | 534th | $87,676±$17,439 · within the margin of this tract |
| Tract 2106.02 | 535th | $87,571±$10,022 · within the margin of this tract |
| Tract 8024.03 | 536th | $87,525±$6,365 · within the margin of this tract |
| Tract 309 | 537th | $87,485±$21,521 |
| Tract 8318 | 538th | $87,470±$25,950 · within the margin of this tract |
| Tract 8065.02 | 539th | $87,449±$23,805 · within the margin of this tract |
| Tract 8044.03 | 540th | $87,445±$28,084 · 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 309?
2 of the 18 figures for Census Tract 309 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