| Official Name: | Darwin Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Clark County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Clark County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Clark |
| Established Title: | Established |
| Established Date: | November 7, 1854 |
| Area Total Sq Mi: | 27.58 |
| Area Land Sq Mi: | 27.15 |
| Area Water Sq Mi: | 0.43 |
| Area Water Percent: | 1.56 |
| Population As Of: | 2020 |
| Population Total: | 347 |
| Population Density Sq Mi: | auto |
| Elevation Ft: | 532 |
| Coordinates: | 39.3058°N -87.6397°W |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0428874 |
}
Darwin Township is located along the Wabash River in eastern Clark County, Illinois, USA. As of the 2020 census, its population was 347 and it contained 148 housing units.[1] The township was named for the village of Darwin, which was named for the English scientist, Charles Darwin.[2]
According to the 2010 census, the township has a total area of, of which (or 98.44%) is land and (or 1.56%) is water.[3]
The township contains these three cemeteries: Bubeck, Darwin and Hall.
As of the 2020 census there were 347 people, 176 households, and 176 families residing in the township. The population density was 12.58PD/sqmi. There were 148 housing units at an average density of 5.37/sqmi. The racial makeup of the township was 95.68% White, 0.00% African American, 0.29% Native American, 0.00% Asian, 0.00% Pacific Islander, 0.29% from other races, and 3.75% from two or more races. Hispanic or Latino of any race were 0.29% of the population.
There were 176 households, out of which 58.00% had children under the age of 18 living with them, 77.27% were married couples living together, none had a female householder with no spouse present, and none were non-families. No households were made up of individuals. The average household size was 2.62 and the average family size was 2.62.
The township's age distribution consisted of 35.8% under the age of 18, 2.8% from 18 to 24, 2.2% from 25 to 44, 50.5% from 45 to 64, and 8.7% who were 65 years of age or older. The median age was 46.5 years. For every 100 females, there were 182.8 males. For every 100 females age 18 and over, there were 174.1 males.
The median income for a household in the township was $68,981, and the median income for a family was $68,981. Males had a median income of $67,716 versus $38,750 for females. The per capita income for the township was $24,015. About 11.9% of families and 11.3% of the population were below the poverty line, including 10.9% of those under age 18 and 52.5% of those age 65 or over.