Census-designated place · Illinois
Twin Grove, Illinois
Twin Grove, census-designated place, in McLean County, Illinois. Twin Grove had 1,524 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 1,458 (±190). GEOID 1776511.
Residents, 2020 Census
1,524
Census count or controlled total
ACS 2020-2024 estimate: 1,458 ±190
Median household income
$116,250
±$21,649 (90% margin)
Illinois: $83,390
Median home value
$264,800
±$32,564 (90% margin)
Illinois: $263,300
Median gross rent
not published
Illinois: $1,274
Where is Twin Grove and what county is it in?
Twin Grove is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in McLean County, Illinois. It covers 4.0 square miles of land, 384 residents per square mile in 2020.
Twin Grove is in the Bloomington, IL metropolitan statistical area (Census Bureau delineation, July 2023).
Twin Grove lies mostly within Dry Grove Township and reaches into Dale Township, towns or townships with their own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Twin Grove, and is it growing?
The 2020 Census counted 1,524 residents in Twin Grove, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 1,458 (±190).
The Census Bureau publishes yearly population estimates for incorporated places only; Twin Grove is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Twin Grove | McLean County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 1,458 ±190 | 171,556 | no clear change |
| Households | 558 ±76 | 70,220 | no clear change |
| Average household size | 2.61 ±0.19 | 2.31 | no clear change |
| Housing units | 587 ±76 | 75,305 | no clear change |
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 Twin Grove?
The median resident of Twin Grove is 49.4 years old; 21.7% are under 18 and 27.2% are 65 or older. The largest group is non-Hispanic white residents at 89.2%, then non-Hispanic residents of two or more races at 4.7%.
| Measure | Twin Grove | McLean County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 49.4 ±6.0 | 34.3 | no clear change |
| Under 18 years | 21.7% ±4.5 pts | 21.2% | – |
| 65 years and over | 27.2% ±7.2 pts | 14.6% | – |
| Male | 51.9% ±3.7 pts | 48.9% | – |
| Hispanic or Latino (any race) | 3.4% ±2.7 pts | 6.4% | – |
| White alone, not Hispanic | 89.2% ±5.1 pts | 76.2% | −7.5 pts |
| Black or African American alone, not Hispanic | 2.1% ±1.6 pts | 8.4% | – |
| Asian alone, not Hispanic | 0.5% ±0.7 pts | 5.2% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.3 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±2.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.7% ±3.3 pts | 3.3% | – |
| Some other race alone, not Hispanic | 0.0% ±2.5 pts | 0.3% | – |
| Born outside the United States | 2.7% ±2.5 pts | 7.6% | – |
| Speak a language other than English at home (age 5+) | 3.5% ±3.3 pts | 9.7% | – |
| Civilian veterans (age 18+) | 9.0% ±3.7 pts | 5.3% | – |
| With a disability | 9.5% ±4.5 pts | 10.1% | – |
| No health insurance coverage | 0.6% ±0.9 pts | 4.6% | – |
| High school graduate or higher (age 25+) | 98.2% ±1.5 pts | 95.9% | – |
| Bachelor's degree or higher (age 25+) | 59.7% ±7.9 pts | 47.2% | no clear change |
| Graduate or professional degree (age 25+) | 23.8% ±5.4 pts | 16.2% | – |
| Lived in the same house a year earlier | 92.0% ±5.3 pts | 85.1% | – |
| Moved from another state in the past year | 2.1% ±2.7 pts | 1.5% | – |
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 Twin Grove earn?
Half of Twin Grove's 558 households earn less than $116,250 a year (±$21,649), against $79,905 in McLean County and $83,390 in Illinois. In 2015-2019 it was $132,832 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Twin Grove | McLean County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $116,250 ±$21,649 | $79,905 | no clear change |
| Mean household income | $210,541 ±$92,924 | $105,003 | – |
| Per capita income | $80,287 ±$37,464 | $43,372 | no clear change |
| People below the poverty line | 4.2% ±3.8 pts | 12.9% | – |
| Children under 18 below the poverty line | 4.6% ±5.7 pts | 9.4% | – |
| Households receiving SNAP | 2.3% ±2.7 pts | 10.3% | – |
| Households with a computer | 99.3% ±1.3 pts | 96.6% | – |
| Households with a broadband subscription | 99.3% ±1.3 pts | 90.0% | – |
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 Twin Grove?
Owners occupy 97.1% of Twin Grove's occupied homes and renters 2.9%. The median owner-occupied home is valued at $264,800 by its owner (±$32,564).
| Measure | Twin Grove | McLean County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $264,800 ±$32,564 | $208,400 | no clear change |
| Renters paying 35% or more of income on rent | 0.0% ±88.4 pts | 39.1% | – |
| Median monthly owner costs, with a mortgage | $2,000 ±$329 | $1,673 | – |
| Owner-occupied homes | 97.1% ±3.6 pts | 65.1% | no clear change |
| Renter-occupied homes | 2.9% ±3.6 pts | 34.9% | – |
| Housing units | 587 ±76 | 75,305 | no clear change |
| Homeowner vacancy rate | 3.2% ±4.6 pts | 0.6% | – |
| Rental vacancy rate | 0.0% ±79.6 pts | 5.5% | – |
| Single-family detached homes | 96.8% ±4.0 pts | 60.3% | – |
| Mobile homes | 0.0% ±6.2 pts | 3.6% | – |
| Built 2020 or later | 1.9% ±2.6 pts | 0.9% | – |
| Built 2010 to 2019 | 1.5% ±2.2 pts | 6.9% | – |
| Built 1939 or earlier | 1.0% ±1.5 pts | 13.8% | – |
| Households with no vehicle | 1.4% ±1.8 pts | 5.9% | – |
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 Twin Grove work and get to work?
65.1% of Twin Grove's workers drive alone and 24.4% work from home. The average trip to work takes 23.2 minutes.
| Measure | Twin Grove | McLean County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.3% ±6.8 pts | 64.8% | – |
| Unemployment rate | 0.0% ±4.8 pts | 3.1% | – |
| Drove alone to work | 65.1% ±11.0 pts | 69.1% | – |
| Carpooled | 10.5% ±9.4 pts | 7.8% | – |
| Public transportation | 0.0% ±4.8 pts | 0.7% | – |
| Walked | 0.0% ±4.8 pts | 4.0% | – |
| Worked from home | 24.4% ±11.8 pts | 17.5% | no clear change |
| Mean travel time to work | 23.2 min ±3.2 | 18.3 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 Twin Grove?
No census tract lies mostly in Twin Grove; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 52.01McLean County | 957 | $112,708 |
| Tract 60McLean County | 3,569 | $108,125 |
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 Twin Grove) · Census block assignment files
How does Twin Grove compare with other places in Illinois?
Twin Grove ranks 181st of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 1,144th | 1,383 |
| Residents per square mile | 813th | 1,383 |
| Median household income | 181st | 1,380 |
| Per capita income | 41st | 1,383 |
| Median home value | 335th | 1,379 |
| Bachelor's degree or higher | 81st | 1,369 |
| Median age | 102nd | 1,383 |
| Owner-occupied share | 36th | 1,382 |
| Work from home | 80th | 1,015 |
| Travel time to work | 902nd | 1,382 |
Twin Grove's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Twin Grove 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 Twin Grove?
27 of the 56 figures for Twin Grove 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 Twin Grove 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.