Township · Illinois
Aux Sable Township, Illinois
Aux Sable Township, township, in Grundy County, Illinois. Aux Sable Township had 15,963 residents on July 1, 2025 by the Census Bureau's estimate, up 4.0% since 2020; the 2020 Census counted 15,361 and the ACS 2020-2024 5-year estimates put it at 15,630 (±52). GEOID 1706303090.
Residents, July 2025 estimate
15,963
Census Bureau estimate (no margin published)
2020 Census count: 15,361 · ACS 2020-2024: 15,630 ±52
Median household income
$109,269
±$8,507 (90% margin)
Illinois: $83,390
Median home value
$321,100
±$12,850 (90% margin)
Illinois: $263,300
Median gross rent
$1,504
±$148 (90% margin)
Illinois: $1,274
Where is Aux Sable Township and what county is it in?
Aux Sable Township is a township in Grundy County, Illinois. It covers 29.1 square miles of land, 528 residents per square mile in 2020.
One place lies inside Aux Sable Township: Minooka (village, 12,758 in 2020). Part of Channahon (village) also lies in it.
Aux Sable Township is in the Chicago-Naperville-Elgin, IL-IN metropolitan statistical area, which takes in 13 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 Aux Sable Township, and is it growing?
The Census Bureau estimates that 15,963 people lived in Aux Sable Township on July 1, 2025, up 4.0% since 2020, while Illinois shrank 0.8%. The 2020 Census counted 15,361 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 15,630 (±52).
| Measure | Aux Sable Township | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 15,630±52 | 53,219 | +2,337 |
| Households | 5,293±231 | 20,595 | +819 |
| Average household size | 2.95±0.13 | 2.57 | no clear change |
| Housing units | 5,410±261 | 21,384 | +821 |
Aux Sable Township's population since 2000
From 4,525 in 2000 to 15,963 in 2025: up 252.8%. The 2000, 2010 and 2020 figures are census counts, each for Aux Sable 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 Aux Sable Township?
The median resident of Aux Sable Township is 32.0 years old; 27.9% are under 18 and 8.6% are 65 or older. The largest group is non-Hispanic white residents at 74.5%, then Hispanic or Latino residents (of any race) at 18.9%. 6.8% of residents were born outside the United States.
| Measure | Aux Sable Township | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 32.0±1.5 | 38.3 | no clear change |
| Under 18 years | 27.9%±1.9 pts | 24.3% | – |
| 65 years and over | 8.6%±1.7 pts | 15.1% | – |
| Male | 49.7%±2.3 pts | 50.4% | – |
| Hispanic or Latino (any race) | 18.9%±2.6 pts | 12.0% | no clear change |
| White alone, not Hispanic | 74.5%±3.6 pts | 82.4% | no clear change |
| Black or African American alone, not Hispanic | 4.2%±1.7 pts | 2.3% | no clear change |
| Asian alone, not Hispanic | 0.4%±0.4 pts | 0.6% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.7%±1.0 pts | 2.4% | – |
| Some other race alone, not Hispanic | 0.2%±0.3 pts | 0.3% | – |
| Born outside the United States | 6.8%±2.6 pts | 4.1% | no clear change |
| Speak a language other than English at home (age 5+) | 13.2%±2.8 pts | 8.5% | – |
| Civilian veterans (age 18+) | 3.7%±1.2 pts | 7.1% | – |
| With a disability | 4.9%±1.7 pts | 9.7% | – |
| No health insurance coverage | 1.5%±0.9 pts | 3.4% | −2.7 pts |
| High school graduate or higher (age 25+) | 93.8%±2.5 pts | 93.8% | – |
| Bachelor's degree or higher (age 25+) | 28.6%±4.5 pts | 23.6% | no clear change |
| Graduate or professional degree (age 25+) | 9.4%±3.1 pts | 7.5% | – |
| Lived in the same house a year earlier | 89.2%±4.8 pts | 90.8% | – |
| Moved from another state in the past year | 0.8%±1.1 pts | 0.8% | – |
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 Aux Sable Township earn?
Half of Aux Sable Township's 5,293 households earn less than $109,269 a year (±$8,507), against $92,235 in Grundy County and $83,390 in Illinois. In 2015-2019 it was $106,609 in 2024 dollars; the margins of error cannot tell the two periods apart. 3.9% of residents live below the poverty line.
| Measure | Aux Sable Township | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $109,269±$8,507 | $92,235 | no clear change |
| Mean household income | $131,238±$12,566 | $111,828 | – |
| Per capita income | $44,185±$4,012 | $43,656 | no clear change |
| People below the poverty line | 3.9%±2.3 pts | 6.0% | no clear change |
| Children under 18 below the poverty line | 2.9%±2.5 pts | 8.1% | – |
| Households receiving SNAP | 5.6%±3.0 pts | 10.9% | – |
| Households with a computer | 97.8%±1.5 pts | 95.6% | – |
| Households with a broadband subscription | 95.9%±3.1 pts | 91.8% | – |
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 Aux Sable Township?
Owners occupy 85.1% of Aux Sable Township's occupied homes and renters 14.9%. The median owner-occupied home is valued at $321,100 by its owner (±$12,850). The median renter pays $1,504 a month including utilities, and 44.7% of renters pay 35% or more of their income on rent.
| Measure | Aux Sable Township | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $321,100±$12,850 | $271,700 | +$77,176 |
| Median gross rent | $1,504±$148 | $1,177 | no clear change |
| Renters paying 35% or more of income on rent | 44.7%±16.4 pts | 35.0% | no clear change |
| Median monthly owner costs, with a mortgage | $2,193±$75 | $2,016 | – |
| Owner-occupied homes | 85.1%±3.7 pts | 74.4% | no clear change |
| Renter-occupied homes | 14.9%±3.7 pts | 25.6% | – |
| Housing units | 5,410±261 | 21,384 | +821 |
| Homeowner vacancy rate | 0.0%±0.8 pts | 0.3% | – |
| Rental vacancy rate | 0.0%±4.6 pts | 1.0% | – |
| Single-family detached homes | 73.4%±4.6 pts | 71.8% | – |
| Mobile homes | 6.2%±2.8 pts | 3.9% | – |
| Built 2020 or later | 3.2%±2.2 pts | 1.8% | – |
| Built 2010 to 2019 | 17.5%±5.2 pts | 9.4% | – |
| Built 1939 or earlier | 2.9%±2.3 pts | 11.2% | – |
| Households with no vehicle | 2.5%±1.7 pts | 4.0% | – |
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 Aux Sable Township work and get to work?
82.1% of Aux Sable Township's workers drive alone and 11.9% work from home. The average trip to work takes 31.0 minutes. The unemployment rate in 2020-2024 averaged 6.0%.
| Measure | Aux Sable Township | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 76.5%±3.3 pts | 67.3% | – |
| Unemployment rate | 6.0%±2.6 pts | 4.6% | no clear change |
| Drove alone to work | 82.1%±3.8 pts | 82.1% | – |
| Carpooled | 4.8%±2.1 pts | 5.2% | – |
| Public transportation | 0.7%±0.9 pts | 0.4% | – |
| Walked | 0.1%±0.2 pts | 1.4% | – |
| Worked from home | 11.9%±3.7 pts | 10.0% | +7.5 pts |
| Mean travel time to work | 31.0 min±2.3 | 26.8 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 Aux Sable Township?
2 census tracts lie mostly in Aux Sable Township, and 1 more reaches into it (2020 census blocks). Their median household incomes run from $104,547 (Tract 1.02) to $108,803 (Tract 1.03).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 1.02Grundy County | 8,602 | $104,547 |
| Tract 1.03Grundy County | 7,337 | $108,803 |
| Tract 7Grundy County | 5,910 | $79,357 |
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 Aux Sable Township) · Census block assignment files
How does Aux Sable Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Aux Sable Township is the 782nd-most populous of the 16,079 U.S. towns and townships that have one and the 115th-most populous of 1,407 in Illinois.
Aux Sable Township ranks 241st 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 | 115th | 1,407 |
| Growth 2020-2025 (PEP) | 66th | 1,347 |
| Residents per square mile | 769th | 1,383 |
| Median household income | 241st | 1,380 |
| Per capita income | 426th | 1,383 |
| Median home value | 214th | 1,379 |
| Median gross rent | 198th | 1,280 |
| Poverty rate | 1,039th | 1,119 |
| Bachelor's degree or higher | 513th | 1,369 |
| Median age | 1,338th | 1,383 |
| Owner-occupied share | 352nd | 1,382 |
| Work from home | 450th | 1,015 |
| Travel time to work | 216th | 1,382 |
Aux Sable Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Aux Sable 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 Aux Sable Township?
13 of the 57 figures for Aux Sable 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 Aux Sable 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.