South Twigg Township, Hamilton County, Illinois

37°55′50″N 88°31′59″W / 37.93056°N 88.53306°W / 37.93056; -88.53306Country United StatesState IllinoisCountyHamiltonEstablishedNovember 3, 1885Area • Total18.40 sq mi (47.7 km²) • Land18.35 sq mi (47.5 km²) • Water0.04 sq mi (0.1 km²)  0.24%Elevation427 ft (130 m)Population • Total129 • Density7.0/sq mi (2.7/km²)Time zoneUTC-6 (CST) • Summer (DST)UTC-5 (CDT)ZIP codesFIPS code17-065-71305

South Twigg Township is one of twelve townships in Hamilton County, Illinois, USA. As of the 2020 census, its population was 129 and it contained 60 housing units.^[1] It was formed from a portion of Twigg Township.

According to the 2021 census gazetteer files, South Twigg Township has a total area of 18.40 square miles (47.66 km²), of which 18.35 square miles (47.53 km²) (or 99.76%) is land and 0.04 square miles (0.10 km²) (or 0.24%) is water.^[2]

• Walpole at 37°56′12″N 88°33′17″W / 37.936715°N 88.554775°W / 37.936715; -88.554775

(This list is based on USGS data and may include former settlements.)

The township contains these two cemeteries: Barker and Roberts.

As of the 2020 census^[1] there were 129 people, 81 households, and 53 families residing in the township. The population density was 7.01 inhabitants per square mile (2.71/km²). There were 60 housing units at an average density of 3.26 per square mile (1.26/km²). The racial makeup of the township was 91.47% White, 0.00% African American, 0.00% Native American, 2.33% Asian, 0.00% Pacific Islander, 0.78% from other races, and 5.43% from two or more races. Hispanic or Latino of any race were 2.33% of the population.

There were 81 households, out of which 0.00% had children under the age of 18 living with them, 50.62% were married couples living together, 14.81% had a female householder with no spouse present, and 34.57% were non-families. No households were made up of individuals. The average household size was 1.89 and the average family size was 2.02.

The township's age distribution consisted of 0.0% under the age of 18, 0.0% from 18 to 24, 38.6% from 25 to 44, 61.4% from 45 to 64, and 0.0% who were 65 years of age or older. The median age was 56.2 years. For every 100 females, there were 88.9 males. For every 100 females age 18 and over, there were 88.9 males.

The median income for a household in the township was $65,052, and the median income for a family was $66,510. The per capita income for the township was $26,484. No families and 18.3% of the population were below the poverty line.

Historical population

Census	Pop.	Note	%±
2000	129		—
2010	132		2.3%
2020	129		−2.3%
U.S. Decennial Census[3]

• Eldorado Community Unit School District 4
• Galatia Community Unit School District 1
• Hamilton County Community Unit School District 10

• Illinois's 19th congressional district
• State House District 118
• State Senate District 59

• "South Twigg Township, Hamilton County, Illinois". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved July 6, 2010.
• United States Census Bureau 2009 TIGER/Line Shapefiles
• United States National Atlas

• City-Data.com
• Illinois State Archives
• Township Officials of Illinois
• Hamilton County Historical Society