There are 106 Auto Parts & Accessories Stores in St. Clair County, Illinois, serving a population of 264,433 people in an area of 658 square miles. There is 1 Auto Parts & Accessories Store per 2,494 people, and 1 Auto Parts & Accessories Store per 6 square miles.
In Illinois, St. Clair County is ranked 59th of 102 counties in Auto Parts & Accessories Stores per capita, and 9th of 102 counties in Auto Parts & Accessories Stores per square mile.