There are 150 Gas Stations in St. Clair County, Illinois, serving a population of 264,433 people in an area of 658 square miles. There is 1 Gas Station per 1,762 people, and 1 Gas Station per 4 square miles.
In Illinois, St. Clair County is ranked 48th of 102 counties in Gas Stations per capita, and 7th of 102 counties in Gas Stations per square mile.