|Area||9.90 sq mi (26 km2)|
|- land||9.40 sq mi (24 km2)|
|- water||0.50 sq mi (1 km2)|
|Density||1,705.8 / sq mi (659 / km2)|
|- summer (DST)||CDT (UTC-5)|
|Wikimedia Commons: Cahokia, Illinois|
Cahokia is a village in St. Clair County, Illinois, United States. As of the 2000 census, the village had a population of 16,391. The name is a reference to one of the clans of the historic Illini confederacy, who were encountered by early French explorers to the region.
Early European settlers also named Cahokia Mounds after the Illini. This is an extensive prehistoric Mississippian culture urban complex located to the north in present-day Collinsville in Madison County. It is a UNESCO World Heritage Site and a State Historic Park.
The village of Cahokia is the home of significant colonial and Federal-period buildings listed on the National Register of Historic Places: the Cahokia Courthouse (c 1740), in the French Colonial style, Church of the Holy Family (Cahokia) (c. 1697), and the Jarrot Mansion (c 1810).
While the Europeans also named the Cahokia Mounds site to the north after the Illini group, archeologists have determined that the earthwork mounds complex was built by the Mississippian culture, an earlier, potentially unrelated indigenous people. The city site reached its peak in the 13th century and was abandoned centuries before European contact. The Cahokia Native Americans did not coalesce as a group and live in the Illinois area until closer to the time of French contact.
The European association with Cahokia began over 300 years ago, with Father Pinet’s mission in late 1696 to convert the Cahokian and Tamaroa Indians to Christianity. Father and the Seminary of Foreign Missions of Quebec built a log church. It is dedicated to the Holy Family. During the next 100 years, Cahokia became one of the largest French colonial towns in the Illinois Country.
Cahokia had become the center of a large area for trading Indian goods and furs. The village had about 3,000 inhabitants, 24 brothels, and a thriving business district. The nearby town of Kaskaskia on the Mississippi became the region’s leading shipping port, and Fort de Chartres became a military and governmental command center. The 50-mile (80 km) area of land between the two cities was cultivated by farming settlers, known as habitants, whose main crop was wheat. As the area expanded and expanded, the relationship between the settlers and the Indians continued to be peaceful. Settlers were mostly French-Canadian migrants whose families had been in North America for a while.
In the following years, Cahokia suffered, mainly from the French loss in the French and Indian War in 1763. Defeated by Great Britain in what was an extension of the Seven Years War in Europe, the French were forced to cede large parts of the Illinois Country to the victors. Many Cahokians fled in fear of the British, or because they wanted to live under a Catholic power; some went to French villages on the west of the Mississippi River, such as Ste. Genevieve, Missouri.
In 1778, during the American Revolutionary War, George Rogers Clark set up a court in Cahokia, because in earlier years Cahokia was an independent city state. Cahokia officially became part of the United States on July 5, 1778. Soon after that, the 105 Cahokia "heads of household" pledged loyalty to the Continental Congress of the United States.
Later, Cahokia was named the county seat of St. Clair County. The Cahokian Courthouse acted as a United States territorial courthouse and a major political center for the next 24 years. When in 1801 St. Clair County was enlarged, Henry Harrison named the Cahokia Courthouse the legal and governmental center of a sizeable area extending to the Canadian border. By 1814, other counties and territories had been organized, and St. Clair County was defined as its current size. The county seat was moved to Belleville, Illinois.
Cahokia is located at .
According to the 2010 census, the village has a total area of 9.90 square miles (25.6 km2), of which 9.40 square miles (24.3 km2) (or 94.95%) is land and 0.50 square miles (1.3 km2) (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.
 Government and infrastructure
Cahokia Unit School District 187 operates public schools.
- "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.
- "Post Office™ Location - CAHOKIA." United States Postal Service. Retrieved on January 24, 2011.