| Official Name: | Washington Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Carroll County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Carroll County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Carroll |
| Leader Title: | Supervisor |
| Leader Name: | Julie Brigham |
| Area Total Sq Mi: | 39.74 |
| Area Land Sq Mi: | 35.39 |
| Area Water Sq Mi: | 4.35 |
| Area Water Percent: | 10.95 |
| Population As Of: | 2020 |
| Population Total: | 317 |
| Population Density Sq Mi: | auto |
| Elevation M: | 200 |
| Elevation Ft: | 656 |
| Coordinates: | 42.1639°N -90.1697°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61028, 61074 |
| Blank Name: | FIPS code |
| Blank Info: | 17-015-79020 |
| Unit Pref: | Imperial |
Washington Township is one of twelve townships in Carroll County, Illinois, USA. As of the 2020 census, its population was 317 and it contained 177 housing units.[1]
According to the 2010 census, the township has a total area of, of which (or 89.05%) is land and (or 10.95%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains Mosquito Hill Cemetery which is also known as St. Peter's Evangelical Lutheran Cemetery. The cemetery is the site of the former St. Matthew's Evangelical Lutheran Church.
As of the 2020 census there were 317 people, 194 households, and 125 families residing in the township. The population density was 7.94PD/sqmi. There were 177 housing units at an average density of 4.43/sqmi. The racial makeup of the township was 96.85% White, 0.95% African American, 0.00% Native American, 0.00% Asian, 0.00% Pacific Islander, 0.00% from other races, and 2.21% from two or more races. Hispanic or Latino of any race were 1.58% of the population.
There were 194 households, out of which 12.90% had children under the age of 18 living with them, 59.28% were married couples living together, 0.00% had a female householder with no spouse present, and 35.57% were non-families. 12.40% of all households were made up of individuals, and 5.70% had someone living alone who was 65 years of age or older. The average household size was 2.08 and the average family size was 2.38.
The township's age distribution consisted of 13.6% under the age of 18, 20.5% from 18 to 24, 19.2% from 25 to 44, 21.5% from 45 to 64, and 25.0% who were 65 years of age or older. The median age was 41.9 years. For every 100 females, there were 92.4 males. For every 100 females age 18 and over, there were 95.0 males.
The median income for a household in the township was $68,947, and the median income for a family was $76,250. Males had a median income of $38,333 versus $23,906 for females. The per capita income for the township was $33,681. About 0.0% of families and 2.7% of the population were below the poverty line, including 0.0% of those under age 18 and 10.9% of those age 65 or over.