Liberty Township is one of fifteen townships in Effingham County, Illinois, USA. As of the 2020 census, its population was 731 and it contained 351 housing units.

According to the 2021 census gazetteer files, the township (S½ T9N R4E) has a total area of 17.97 square miles (46.5 km), all land.

• Beecher City

• Holland, Illinois

The township contains these four cemeteries: Agney, Beecher, Memorial Gardens and Tipsword.

• Illinois Route 33

As of the 2020 census there were 731 people, 288 households, and 142 families residing in the township. The population density was 40.69 inhabitants per square mile (15.71/km). There were 351 housing units at an average density of 19.54 per square mile (7.54/km). The racial makeup of the township was 91.79% White, 0.27% African American, 0.27% Native American, 0.14% Asian, 0.14% Pacific Islander, 0.27% from other races, and 7.11% from two or more races. Hispanic or Latino of any race were 2.46% of the population.

There were 288 households, out of which 19.80% had children under the age of 18 living with them, 33.68% were married couples living together, 5.90% had a female householder with no spouse present, and 50.69% were non-families. 40.30% of all households were made up of individuals, and 13.50% 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 2.80.

The township's age distribution consisted of 16.2% under the age of 18, 17.9% from 18 to 24, 18.4% from 25 to 44, 33.3% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 43.5 years. For every 100 females, there were 117.0 males. For every 100 females age 18 and over, there were 111.8 males.

The median income for a household in the township was $43,214, and the median income for a family was $64,000. Males had a median income of $34,318 versus $25,000 for females. The per capita income for the township was $28,544. About 11.3% of families and 14.5% of the population were below the poverty line, including 26.7% of those under age 18 and 16.7% of those age 65 or over.

Historical population

Census	Pop.	Note	%±
2000	804		—
2010	764		−5.0%
2020	731		−4.3%
U.S. Decennial Census

• Beecher City Community Unit School District 20

• Illinois' 19th congressional district
• State House District 109
• State Senate District 55

• "Liberty Township, Effingham County, Illinois". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved January 16, 2010.
• United States Census Bureau 2007 TIGER/Line Shapefiles
• United States National Atlas

• City-Data.com
• Illinois State Archives