| Official Name: | Clarion Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Bureau County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Bureau County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Bureau |
| Established Title: | Established |
| Established Date: | November 6, 1849 |
| Area Total Sq Mi: | 35.35 |
| Area Land Sq Mi: | 35.35 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2020 |
| Population Total: | 410 |
| Population Density Sq Mi: | auto |
| Elevation M: | 254 |
| Elevation Ft: | 833 |
| Coordinates: | 41.5378°N -89.2253°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 61330, 61342 |
| Blank Name: | FIPS code |
| Blank Info: | 17-011-14598 |
| Unit Pref: | Imperial |
Clarion Township is one of twenty-five townships in Bureau County, Illinois, USA. As of the 2020 census, its population was 410 and it contained 177 housing units.[1]
According to the 2010 census, the township has a total area of, all land.[2]
(This list is based on USGS data and may include former settlements.)Both locations were railroad stations with no residential buildings immediately adjacent. Clarion was a station on what is now the Burlington Northern mainline a few miles southwest of Mendota. No siding or any visible sign of a station exists—and has not since at least 1950. Wendel station was on a Burlington Northern branch line about four miles west of Mendota. A grain elevator (at one time operated by the Wendel family) was the only structure other than nearby farmsteads. The branch railroad was abandoned and all rails removed circa 1975.
The township contains these five cemeteries: Clarion Lutheran, Erbes, German Evangelical, Hetzler and Hill.
As of the 2020 census there were 410 people, 98 households, and 68 families residing in the township. The population density was 11.6PD/sqmi. There were 177 housing units at an average density of 5.01/mi2. The racial makeup of the township was 91.71% White, 0.49% African American, 0.49% Native American, 0.49% Asian, 0.00% Pacific Islander, 3.41% from other races, and 3.41% from two or more races. Hispanic or Latino of any race were 4.88% of the population.
There were 98 households, out of which 30.60% had children under the age of 18 living with them, 66.33% were married couples living together, 3.06% had a female householder with no spouse present, and 30.61% were non-families. 18.40% 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 2.44 and the average family size was 2.82.
The township's age distribution consisted of 17.6% under the age of 18, 2.1% from 18 to 24, 14.3% from 25 to 44, 51.4% from 45 to 64, and 14.6% who were 65 years of age or older. The median age was 50.7 years. For every 100 females, there were 81.1 males. For every 100 females age 18 and over, there were 82.4 males.
The median income for a household in the township was $102,500, and the median income for a family was $109,107. Males had a median income of $46,875 versus $43,125 for females. The per capita income for the township was $43,908. About 4.4% of families and 6.3% of the population were below the poverty line, including 16.7% of those under age 18 and none of those age 65 or over.