N/A of the households in St. Clair County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
St. Clair County, IL borders Clinton County, IL, Madison County, IL, Monroe County, IL, Randolph County, IL, Washington County, IL, St. Louis County, MO, and St. Louis city, MO.