Township · Illinois
Cahokia Township, Illinois
Cahokia Township, township, in Macoupin County, Illinois. Cahokia Township had 3,084 residents on July 1, 2025 by the Census Bureau's estimate, down 3.4% since 2020; the 2020 Census counted 3,151 and the ACS 2020-2024 5-year estimates put it at 3,128 (±37). GEOID 1711710357.
Residents, July 2025 estimate
3,084
Census Bureau estimate (no margin published)
2020 Census count: 3,151 · ACS 2020-2024: 3,128 ±37
Median household income
$57,132
±$8,610 (90% margin)
Illinois: $83,390
Median home value
$96,900
±$17,982 (90% margin)
Illinois: $263,300
Median gross rent
$860
±$88 (90% margin)
Illinois: $1,274
Where is Cahokia Township and what county is it in?
Cahokia Township is a township in Macoupin County, Illinois. It covers 36.6 square miles of land, 86 residents per square mile in 2020.
3 places lie inside Cahokia Township: Benld (city, 1,464 in 2020), Lake Ka-Ho (village, 194 in 2020) and Eagarville (village, 114 in 2020). Part of Gillespie (city) and East Gillespie (village) also lie in it.
Cahokia Township is in the St. Louis, MO-IL metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Cahokia Township, and is it growing?
The Census Bureau estimates that 3,084 people lived in Cahokia Township on July 1, 2025, down 3.4% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 3,151 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 3,128 (±37).
| Measure | Cahokia Township | Macoupin County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,128±37 | 44,350 | −48 |
| Households | 1,441±86 | 17,576 | no clear change |
| Average household size | 2.17±0.13 | 2.47 | no clear change |
| Housing units | 1,920±145 | 21,139 | +322 |
Cahokia Township's population since 2000
From 3,389 in 2000 to 3,084 in 2025: down 9.0%. The 2000, 2010 and 2020 figures are census counts, each for Cahokia Township as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Cahokia Township?
The median resident of Cahokia Township is 48.2 years old; 16.9% are under 18 and 23.9% are 65 or older. The largest group is non-Hispanic white residents at 94.4%, then non-Hispanic residents of two or more races at 2.1%.
| Measure | Cahokia Township | Macoupin County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 48.2±4.8 | 44.2 | no clear change |
| Under 18 years | 16.9%±3.3 pts | 20.6% | – |
| 65 years and over | 23.9%±5.3 pts | 21.6% | – |
| Male | 54.9%±3.5 pts | 49.4% | – |
| Hispanic or Latino (any race) | 0.6%±0.7 pts | 1.4% | – |
| White alone, not Hispanic | 94.4%±2.6 pts | 93.5% | no clear change |
| Black or African American alone, not Hispanic | 0.8%±1.0 pts | 1.5% | – |
| Asian alone, not Hispanic | 0.2%±0.4 pts | 0.3% | – |
| 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%±1.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.1%±1.5 pts | 3.0% | – |
| Some other race alone, not Hispanic | 1.6%±1.4 pts | 0.2% | – |
| Born outside the United States | 1.7%±1.8 pts | 0.9% | – |
| Speak a language other than English at home (age 5+) | 2.0%±1.9 pts | 1.4% | – |
| Civilian veterans (age 18+) | 6.2%±1.8 pts | 7.6% | – |
| With a disability | 20.8%±3.9 pts | 16.8% | – |
| No health insurance coverage | 5.5%±3.0 pts | 4.1% | no clear change |
| High school graduate or higher (age 25+) | 89.2%±2.9 pts | 91.4% | – |
| Bachelor's degree or higher (age 25+) | 12.0%±4.4 pts | 20.3% | no clear change |
| Graduate or professional degree (age 25+) | 3.1%±1.4 pts | 6.4% | – |
| Lived in the same house a year earlier | 93.5%±2.9 pts | 90.7% | – |
| Moved from another state in the past year | 0.3%±0.4 pts | 1.1% | – |
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 Cahokia Township earn?
Half of Cahokia Township's 1,441 households earn less than $57,132 a year (±$8,610), against $70,805 in Macoupin County and $83,390 in Illinois. In 2015-2019 it was $61,394 in 2024 dollars; the margins of error cannot tell the two periods apart. 15.1% of residents live below the poverty line.
| Measure | Cahokia Township | Macoupin County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $57,132±$8,610 | $70,805 | no clear change |
| Mean household income | $75,470±$10,737 | $90,728 | – |
| Per capita income | $35,698±$4,777 | $37,136 | no clear change |
| People below the poverty line | 15.1%±3.6 pts | 13.1% | no clear change |
| Children under 18 below the poverty line | 13.0%±6.3 pts | 15.8% | −19.9 pts |
| Households receiving SNAP | 19.6%±5.6 pts | 15.4% | – |
| Households with a computer | 91.7%±4.1 pts | 92.0% | – |
| Households with a broadband subscription | 89.2%±3.7 pts | 88.6% | – |
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 Cahokia Township?
Owners occupy 77.9% of Cahokia Township's occupied homes and renters 22.1%. The median owner-occupied home is valued at $96,900 by its owner (±$17,982). The median renter pays $860 a month including utilities, and 28.6% of renters pay 35% or more of their income on rent.
| Measure | Cahokia Township | Macoupin County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $96,900±$17,982 | $138,200 | no clear change |
| Median gross rent | $860±$88 | $801 | no clear change |
| Renters paying 35% or more of income on rent | 28.6%±14.5 pts | 34.8% | no clear change |
| Median monthly owner costs, with a mortgage | $991±$86 | $1,250 | – |
| Owner-occupied homes | 77.9%±5.3 pts | 78.5% | no clear change |
| Renter-occupied homes | 22.1%±5.3 pts | 21.5% | – |
| Housing units | 1,920±145 | 21,139 | +322 |
| Homeowner vacancy rate | 4.1%±4.5 pts | 1.5% | – |
| Rental vacancy rate | 9.7%±7.6 pts | 10.0% | – |
| Single-family detached homes | 87.1%±4.2 pts | 82.2% | – |
| Mobile homes | 8.4%±4.0 pts | 8.1% | – |
| Built 2020 or later | 0.0%±1.9 pts | 0.5% | – |
| Built 2010 to 2019 | 2.7%±1.7 pts | 4.3% | – |
| Built 1939 or earlier | 35.3%±6.4 pts | 25.3% | – |
| Households with no vehicle | 4.4%±2.4 pts | 4.5% | – |
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 Cahokia Township work and get to work?
87.6% of Cahokia Township's workers drive alone and 3.4% work from home. The average trip to work takes 26.4 minutes. The unemployment rate in 2020-2024 averaged 4.7%.
| Measure | Cahokia Township | Macoupin County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 53.8%±4.9 pts | 57.1% | – |
| Unemployment rate | 4.7%±2.0 pts | 3.7% | −4.2 pts |
| Drove alone to work | 87.6%±4.9 pts | 81.6% | – |
| Carpooled | 7.9%±4.8 pts | 5.5% | – |
| Public transportation | 0.0%±2.8 pts | 0.2% | – |
| Walked | 0.1%±0.2 pts | 2.5% | – |
| Worked from home | 3.4%±2.2 pts | 9.4% | – |
| Mean travel time to work | 26.4 min±3.1 | 27.5 min | no clear change |
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 census tracts are in Cahokia Township?
1 census tract lies mostly in Cahokia Township, and 3 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9570Macoupin County | 3,965 | $59,339 |
| Tract 9569Macoupin County | 3,285 | $78,250 |
| Tract 9571Macoupin County | 2,773 | $63,370 |
| Tract 9563Macoupin County | 2,838 | $97,931 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Cahokia Township) · Census block assignment files
How does Cahokia Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Cahokia Township is the 3,499th-most populous of the 16,079 U.S. towns and townships that have one and the 329th-most populous of 1,407 in Illinois.
Cahokia Township ranks 1,163rd of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 329th | 1,407 |
| Growth 2020-2025 (PEP) | 1,090th | 1,347 |
| Residents per square mile | 1,036th | 1,383 |
| Median household income | 1,163rd | 1,380 |
| Per capita income | 847th | 1,383 |
| Median home value | 1,206th | 1,379 |
| Median gross rent | 815th | 1,280 |
| Poverty rate | 273rd | 1,119 |
| Bachelor's degree or higher | 1,271st | 1,369 |
| Median age | 140th | 1,383 |
| Owner-occupied share | 682nd | 1,382 |
| Work from home | 1,003rd | 1,015 |
| Travel time to work | 608th | 1,382 |
Cahokia Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Cahokia Township with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Cahokia Township?
15 of the 57 figures for Cahokia Township 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Cahokia Township are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.