Arcola Township is one of nine townships in Douglas County, Illinois, USA. As of the 2020 census, its population was 3,257 and it contained 1,316 housing units.

Geography
According to the 2021 census gazetteer files, Arcola Township has a total area of , of which  (or 99.79%) is land and  (or 0.21%) is water.

Cities, towns, villages
 Arcola

Unincorporated towns
 Filson at 
 Galton at

Cemeteries
The township contains Township Cemetery.

Major highways
  Interstate 57
  U.S. Route 45
  Illinois Route 133

Demographics
As of the 2020 census there were 3,257 people, 1,128 households, and 791 families residing in the township. The population density was . There were 1,316 housing units at an average density of . The racial makeup of the township was 71.91% White, 0.28% African American, 0.58% Native American, 0.86% Asian, 0.03% Pacific Islander, 18.21% from other races, and 8.14% from two or more races. Hispanic or Latino of any race were 33.31% of the population.

There were 1,128 households, out of which 37.00% had children under the age of 18 living with them, 50.71% were married couples living together, 13.12% had a female householder with no spouse present, and 29.88% were non-families. 21.70% of all households were made up of individuals, and 13.60% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.20.

The township's age distribution consisted of 27.4% under the age of 18, 10.0% from 18 to 24, 25.9% from 25 to 44, 20.6% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 35.5 years. For every 100 females, there were 88.7 males. For every 100 females age 18 and over, there were 88.9 males.

The median income for a household in the township was $60,379, and the median income for a family was $59,009. Males had a median income of $42,313 versus $27,391 for females. The per capita income for the township was $25,362. About 9.6% of families and 11.3% of the population were below the poverty line, including 13.9% of those under age 18 and 17.6% of those age 65 or over.

School districts
 Arcola Consolidated Unit School District 306
 Tuscola Community Unit School District 301

Political districts
 State House District 110
 State Senate District 55

References
 
 United States Census Bureau 2009 TIGER/Line Shapefiles
 United States National Atlas

External links
 City-Data.com
 Illinois State Archives
 Township Officials of Illinois

Townships in Douglas County, Illinois
Townships in Illinois