| Official Name: | Banner Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Effingham County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Effingham County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Effingham |
| Area Total Sq Mi: | 18.03 |
| Area Land Sq Mi: | 18.03 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Total: | 464 |
| Population Density Sq Mi: | auto |
| Elevation M: | 195 |
| Elevation Ft: | 640 |
| Coordinates: | 39.2°N -126°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 62401, 62461 |
| Blank Name: | FIPS code |
| Blank Info: | 17-049-03558 |
| Unit Pref: | Imperial |
Banner Township is one of fifteen townships in Effingham County, Illinois, USA. As of the 2020 census, its population was 464 and it contained 209 housing units.[1]
According to the 2010 census, the township (S½ T9N R5E) has a total area of, all land.[2]
The township contains these four cemeteries: Rentfrow, Saint Marys, Shumway and Trinity Lutheran.
As of the 2020 census there were 464 people, 139 households, and 91 families residing in the township. The population density was 25.73PD/sqmi. There were 209 housing units at an average density of 11.59/sqmi. The racial makeup of the township was 92.67% White, 0.00% African American, 0.22% Native American, 0.65% Asian, 0.00% Pacific Islander, 0.65% from other races, and 5.82% from two or more races. Hispanic or Latino of any race were 2.37% of the population.
There were 139 households, out of which 23.00% had children under the age of 18 living with them, 57.55% were married couples living together, 4.32% had a female householder with no spouse present, and 34.53% were non-families. 25.20% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 2.84.
The township's age distribution consisted of 19.8% under the age of 18, 3.1% from 18 to 24, 24.4% from 25 to 44, 28.6% from 45 to 64, and 23.9% who were 65 years of age or older. The median age was 50.6 years. For every 100 females, there were 113.4 males. For every 100 females age 18 and over, there were 112.5 males.
The median income for a household in the township was $57,083, and the median income for a family was $72,708. Males had a median income of $46,250 versus $36,250 for females. The per capita income for the township was $32,458. About 8.8% of families and 8.2% of the population were below the poverty line, including 4.8% of those under age 18 and 15.8% of those age 65 or over.