There are 161 K-12 Schools in St. Clair County, Illinois, serving a population of 264,433 people in an area of 658 square miles. There is 1 K-12 School per 1,642 people, and 1 K-12 School per 4 square miles.
In Illinois, St. Clair County is ranked 61st of 102 counties in K-12 Schools per capita, and 7th of 102 counties in K-12 Schools per square mile.