| Official Name: | Aux Sable Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Grundy County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Grundy County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Grundy |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 30.38 |
| Area Land Sq Mi: | 29.09 |
| Area Water Sq Mi: | 1.29 |
| Area Water Percent: | 4.26 |
| Population As Of: | 2020 |
| Population Total: | 15361 |
| Population Density Sq Mi: | auto |
| Elevation M: | 168 |
| Elevation Ft: | 551 |
| Coordinates: | 41.4167°N -107°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 60447, 60450, 60481 |
| Blank Name: | FIPS code |
| Blank Info: | 17-063-03090 |
| Unit Pref: | Imperial |
Aux Sable Township (T34N R8E) is one of seventeen townships in Grundy County, Illinois, USA. As of the 2020 census, its population was 15,361 and it contained 5,184 housing units.[1]
According to the 2021 census gazetteer files, Aux Sable Township has a total area of 30.38sqmi, of which 29.09sqmi (or 95.74%) is land and 1.29sqmi (or 4.26%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains these three cemeteries: Aux Sable, Dresden and Saint Marys.
As of the 2020 census there were 15,361 people, 4,596 households, and 3,609 families residing in the township. The population density was 505.58PD/sqmi. There were 5,184 housing units at an average density of 170.62/sqmi. The racial makeup of the township was 80.62% White, 2.84% African American, 0.48% Native American, 1.18% Asian, 0.09% Pacific Islander, 4.54% from other races, and 10.25% from two or more races. Hispanic or Latino of any race were 15.24% of the population.
There were 4,596 households, out of which 52.90% had children under the age of 18 living with them, 65.77% were married couples living together, 9.81% had a female householder with no spouse present, and 21.48% were non-families. 18.80% of all households were made up of individuals, and 7.40% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.33.
The township's age distribution consisted of 30.4% under the age of 18, 8.8% from 18 to 24, 28.9% from 25 to 44, 24.7% from 45 to 64, and 7.2% who were 65 years of age or older. The median age was 33.5 years. For every 100 females, there were 88.9 males. For every 100 females age 18 and over, there were 86.9 males.
The median income for a household in the township was $90,069, and the median income for a family was $94,092. Males had a median income of $61,713 versus $32,430 for females. The per capita income for the township was $33,072. About 4.2% of families and 4.7% of the population were below the poverty line, including 4.5% of those under age 18 and 9.6% of those age 65 or over.