|Area||2.05 sq mi (5 km2)|
|- land||2.03 sq mi (5 km2)|
|- water||0.02 sq mi (0 km2)|
|Density||278.6 / sq mi (108 / km2)|
|- summer (DST)||CDT (UTC-5)|
|Wikimedia Commons: Thompsonville, Illinois|
There was an early settlement started in the general vicinity called Jordan's Settlement. It was founded in 1811, Jason McFarland was the first mayor of the town.
Thompsonville is located at (37.916443, -88.761564).
According to the 2010 census, the village has a total area of 2.05 square miles (5.3 km2), of which 2.03 square miles (5.3 km2) (or 99.02%) is land and 0.02 square miles (0.052 km2) (or 0.98%) is water.
As of the census of 2000, there were 571 people, 222 households, and 166 families residing in the village. The population density was 278.6 people per square mile (107.5/km²). There were 243 housing units at an average density of 118.6 per square mile (45.8/km²). The racial makeup of the village was 98.77% White, 0.35% Native American, and 0.88% from two or more races. Hispanic or Latino of any race were 0.70% of the population.
There were 222 households out of which 32.9% had children under the age of 18 living with them, 61.3% were married couples living together, 10.8% had a female householder with no husband present, and 25.2% were non-families. 21.2% of all households were made up of individuals and 9.0% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 2.96.
In the village the population was spread out with 23.5% under the age of 18, 9.8% from 18 to 24, 31.0% from 25 to 44, 20.5% from 45 to 64, and 15.2% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 95.5 males. For every 100 females age 18 and over, there were 94.2 males.
The median income for a household in the village was $30,500, and the median income for a family was $33,750. Males had a median income of $25,563 versus $17,656 for females. The per capita income for the village was $13,327. About 14.0% of families and 17.8% of the population were below the poverty line, including 25.2% of those under age 18 and 12.3% of those age 65 or over.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "2010 Census U.S. Gazetteer Files for Places – Illinois". United States Census. Retrieved 2012-10-13.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.