| Official Name: | Buck Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Edgar County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Edgar County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Edgar |
| Established Title: | Established |
| Established Date: | November 4, 1856 |
| Area Total Sq Mi: | 34.27 |
| Area Land Sq Mi: | 34.27 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Footnotes: | 214 |
| Population Density Sq Mi: | auto |
| Elevation M: | 206 |
| Elevation Ft: | 676 |
| Coordinates: | 39.6414°N -87.8267°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61917, 61933, 61944, 61949 |
| Blank Name: | FIPS code |
| Blank Info: | 17-045-09213 |
| Unit Pref: | Imperial |
Buck Township is one of fifteen townships in Edgar County, Illinois, USA. As of the 2020 census, its population was 214 and it contained 124 housing units.[1] Buck Township was originally named Pilot Grove Township, but the name was changed on May 9, 1857.
According to the 2021 census gazetteer files, Buck Township has a total area of 34.27sqmi, all land.[2]
As of the 2020 census there were 214 people, 127 households, and 86 families residing in the township. The population density was 6.24PD/sqmi. There were 124 housing units at an average density of 3.62/sqmi. The racial makeup of the township was 98.13% White, 0.00% African American, 0.00% Native American, 0.00% Asian, 0.00% Pacific Islander, 0.00% from other races, and 1.87% from two or more races. Hispanic or Latino of any race were 0.47% of the population.
There were 127 households, out of which 21.30% had children under the age of 18 living with them, 37.01% were married couples living together, 30.71% had a female householder with no spouse present, and 32.28% were non-families. 21.30% of all households were made up of individuals, and 7.10% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.90.
The township's age distribution consisted of 16.7% under the age of 18, 18.6% from 18 to 24, 16.1% from 25 to 44, 31.8% from 45 to 64, and 16.7% who were 65 years of age or older. The median age was 42.2 years. For every 100 females, there were 85.1 males. For every 100 females age 18 and over, there were 77.4 males.
The median income for a household in the township was $55,938, and the median income for a family was $73,667. Males had a median income of $42,917 versus $31,250 for females. The per capita income for the township was $29,175. About 1.2% of families and 6.8% of the population were below the poverty line, including none of those under age 18 and 5.8% of those age 65 or over.