Glen Carbon is a village in Madison County, Illinois, United States, 19 miles (31 km) northeast of St. Louis. The population was 12,934 at the 2010 census.
Glen Carbon is located at 38°45′35″N 89°58′9″W / 38.75972°N 89.96917°W / 38.75972; -89.96917 (38.759801, -89.969204).
According to the 2010 census, Glen Carbon has a total area of 10.188 square miles (26.39 km), of which 10.04 square miles (26.00 km) (or 98.55%) is land and 0.148 square miles (0.38 km) (or 1.45%) is water.
As of the census of 2000, there were 10,425 people, 4,011 households, and 2,815 families residing in the village. The population density was 1,405.5 people per square mile (542.5/km²). There were 4,236 housing units at an average density of 571.1 per square mile (220.4/km²). The racial makeup of the village was 89.09% White, 6.96% African American, 0.20% Native American, 2.12% Asian, 0.04% Pacific Islander, 0.41% from other races, and 1.17% from two or more races. Hispanic or Latino of any race were 1.50% of the population.
There were 4,011 households out of which 34.9% had children under the age of 18 living with them, 59.6% were married couples living together, 8.1% had a female householder with no husband present, and 29.8% were non-families. 22.1% of all households were made up of individuals and 7.8% 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 3.06.
In the village, the population was spread out with 25.3% under the age of 18, 10.2% from 18 to 24, 30.0% from 25 to 44, 23.5% from 45 to 64, and 11.0% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 94.5 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the village was $55,841, and the median income for a family was $72,182. Males had a median income of $50,086 versus $31,689 for females. The per capita income for the village was $26,374. About 3.2% of families and 5.8% of the population were below the poverty line, including 5.8% of those under age 18 and 6.2% of those age 65 or over.