| Official Name: | Cass Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Fulton County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Fulton County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Fulton |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 39.55 |
| Area Land Sq Mi: | 39.40 |
| Area Water Sq Mi: | 0.15 |
| Area Water Percent: | 0.37 |
| Population As Of: | 2020 |
| Population Total: | 561 |
| Population Density Sq Mi: | auto |
| Elevation M: | 192 |
| Elevation Ft: | 630 |
| Coordinates: | 40.4947°N -90.2817°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61427, 61477, 61542 |
| Blank Name: | FIPS code |
| Blank Info: | 17-057-11696 |
| Unit Pref: | Imperial |
Cass Township is one of twenty-six townships in Fulton County, Illinois, USA. As of the 2020 census, its population was 561 and it contained 253 housing units.[1]
According to the 2021 census gazetteer files, Cass Township has a total area of 39.55sqmi, of which 39.4sqmi (or 99.63%) is land and 0.15sqmi (or 0.37%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains these six cemeteries: Baughman, Buckeye, Fuller, Henderson, Howard and Sinnett Chapel.
As of the 2020 census there were 561 people, 227 households, and 154 families residing in the township. The population density was 14.19PD/sqmi. There were 253 housing units at an average density of 6.4/sqmi. The racial makeup of the township was 95.37% White, 0.00% African American, 0.18% Native American, 0.71% Asian, 0.00% Pacific Islander, 0.53% from other races, and 3.21% from two or more races. Hispanic or Latino of any race were 1.25% of the population.
There were 227 households, out of which 30.80% had children under the age of 18 living with them, 56.39% were married couples living together, 7.93% had a female householder with no spouse present, and 32.16% were non-families. 30.00% of all households were made up of individuals, and 14.10% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.82.
The township's age distribution consisted of 21.9% under the age of 18, 8.3% from 18 to 24, 13.2% from 25 to 44, 28.1% from 45 to 64, and 28.6% who were 65 years of age or older. The median age was 49.7 years. For every 100 females, there were 126.5 males. For every 100 females age 18 and over, there were 120.0 males.
The median income for a household in the township was $55,313, and the median income for a family was $63,750. Males had a median income of $36,875 versus $31,250 for females. The per capita income for the township was $25,437. About 5.2% of families and 4.6% of the population were below the poverty line, including 7.0% of those under age 18 and 2.0% of those age 65 or over.