None of the households in St. Charles County, MO 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.
97.9% of the residents in St. Charles County, MO are U.S. citizens.
St. Charles County, MO borders Calhoun County, IL, Jersey County, IL, Madison County, IL, Franklin County, MO, Lincoln County, MO, St. Louis County, MO, and Warren County, MO.