| Official Name: | Denning Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Franklin County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Franklin County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Franklin |
| Established Title: | Established |
| Established Date: | November 4, 1884 |
| Area Total Sq Mi: | 36.99 |
| Area Land Sq Mi: | 35.85 |
| Area Water Sq Mi: | 1.14 |
| Area Water Percent: | 3.09 |
| Population As Of: | 2020 |
| Population Total: | 4729 |
| Population Density Sq Mi: | auto |
| Elevation M: | 118 |
| Elevation Ft: | 387 |
| Coordinates: | 37.9081°N -88.9842°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 62812, 62865, 62874, 62896 |
| Blank Name: | FIPS code |
| Blank Info: | 17-055-19421 |
| Unit Pref: | Imperial |
Denning Township is one of twelve townships in Franklin County, Illinois, USA. As of the 2020 census, its population was 4,729 and it contained 2,352 housing units.[1]
According to the 2021 census gazetteer files, Denning Township has a total area of 36.99sqmi, of which 35.85sqmi (or 96.91%) is land and 1.14sqmi (or 3.09%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Denning, Follis, Hanes and Rose.
As of the 2020 census there were 4,729 people, 2,097 households, and 1,165 families residing in the township. The population density was 127.85PD/sqmi. There were 2,352 housing units at an average density of 63.58/sqmi. The racial makeup of the township was 93.40% White, 0.42% African American, 0.36% Native American, 0.30% Asian, 0.00% Pacific Islander, 0.42% from other races, and 5.10% from two or more races. Hispanic or Latino of any race were 1.29% of the population.
There were 2,097 households, out of which 29.00% had children under the age of 18 living with them, 37.05% were married couples living together, 12.54% had a female householder with no spouse present, and 44.44% were non-families. 39.40% of all households were made up of individuals, and 20.60% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 3.12.
The township's age distribution consisted of 23.3% under the age of 18, 8.5% from 18 to 24, 20.9% from 25 to 44, 29.2% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 43.4 years. For every 100 females, there were 105.4 males. For every 100 females age 18 and over, there were 85.8 males.
The median income for a household in the township was $31,048, and the median income for a family was $43,542. Males had a median income of $38,676 versus $19,444 for females. The per capita income for the township was $20,283. About 22.7% of families and 24.7% of the population were below the poverty line, including 30.2% of those under age 18 and 26.1% of those age 65 or over.