As of the 2010 census , 15,241 people lived in the village , a decline from 16,391 in 2000 .
Cahokia is a village in St. Clair County , Illinois , United States which is 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 a village in St. Clair County , Illinois , United States which is in the Greater St. Louis metropolitan area .