There are 111 Plumbing Services in St. Clair County, Illinois, serving a population of 264,433 people in an area of 658 square miles. There is 1 Plumbing Service per 2,382 people, and 1 Plumbing Service per 5 square miles.
In Illinois, St. Clair County is ranked 37th of 102 counties in Plumbing Services per capita, and 8th of 102 counties in Plumbing Services per square mile.