Pierron is a village in Bond and Madison counties, Illinois, United States. The population was 459 at the 2020 census, down from 600 at the 2010 census. The village is part of the St. Louis metropolitan area. History The first post office was established at Pierron in 1870. Pierron was laid out as a village in 1871, and named for its founder Jacques Pierron. Pierron was incorporated as a village in 1893. Geography Pierron is located in southwestern Bond County and eastern Madison County at (38.778767, -89.559306). The village has two sections that are apart and connected by Illinois Route 143. The western section, also known as "Pierron Station" and crossed by the CSX Transportation St. Louis Line railroad, is on the Bond–Madison county line, while the eastern section, also known as "Baden Baden", is four miles to the east. Highland is southwest of the western part of Pierron, while Pocahontas is north of the eastern part. According to the U.S. Census Bureau, Pierron has a total area of , all land. The western part of the village drains west to Sugar Creek, while the east part drains east to Shoal Creek, both of which are south-flowing tributaries of the Kaskaskia River. Demographics As of the 2020 census there were 459 people, 180 households, and 111 families residing in the village. The population density was . There were 232 housing units at an average density of . The racial makeup of the village was 92.37% White, 0.65% African American, 0.44% Native American, 0.22% Asian, 0.65% from other races, and 5.66% from two or more races. Hispanic or Latino of any race were 1.74% of the population. There were 180 households, out of which 21.11% had children under the age of 18 living with them, 55.00% were married couples living together, 6.67% had a female householder with no husband present, and 38.33% were non-families. 25.00% of all households were made up of individuals, and 11.11% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 2.18. The village's age distribution consisted of 13.7% under the age of 18, 3.6% from 18 to 24, 24.9% from 25 to 44, 31.9% from 45 to 64, and 26.0% who were 65 years of age or older. The median age was 52.3 years. For every 100 females, there were 110.2 males.