Cahokia is a village in St. Clair County, Illinois, United States. It is located east of the Mississippi River in the Greater St. Louis metropolitan area. As of the 2010 census, 15,241 people lived in the village, a decline from 16,391 in 2000.
Cahokia is located at 38°33′43″N 90°10′22″W / 38.561901°N 90.172878°W / 38.561901; -90.172878.
According to the 2010 census, Cahokia has a total area of 9.9 square miles (25.64 km), of which 9.4 square miles (24.35 km) (or 94.95%) is land and 0.5 square miles (1.29 km) (or 5.05%) is water.
As of the census of 2000, there were 16,391 people, 5,693 households, and 4,252 families residing in the village. The population density was 1,705.8 people per square mile (658.5/km²). There were 6,213 housing units at an average density of 646.6 per square mile (249.6/km²). The racial makeup of the village was 58.28% African American, 38.69% White, 0.32% Native American, 0.38% Asian, 0.03% Pacific Islander, 0.73% from other races, and 1.56% from two or more races. Hispanic or Latino of any race were 2.25% of the population.
There were 5,693 households out of which 41.2% had children under the age of 18 living with them, 43.2% were married couples living together, 25.7% had a female householder with no husband present, and 25.3% were non-families. 20.9% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.27.
In the village, the population was spread out with 33.4% under the age of 18, 8.7% from 18 to 24, 29.4% from 25 to 44, 16.9% from 45 to 64, and 11.6% who were 65 years of age or older. The median age was 31 years. For every 100 females, there were 88.7 males. For every 100 females age 18 and over, there were 82.5 males.
The median income for a household in the village was $31,001, and the median income for a family was $35,582. Males had a median income of $31,806 versus $22,429 for females. The per capita income for the village was $14,545. About 22.8% of families and 24.9% of the population were below the poverty line, including 37.0% of those under age 18 and 5.3% of those age 65 or over.
Cahokia Illinois neighborhoods include: Cahokia, Genevieve Place, Parklane Manor, Parkway View