N/A of the households in Jefferson 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.
Jefferson County, MO borders Monroe County, IL, Franklin County, MO, Ste. Genevieve County, MO, St. Francois County, MO, St. Louis County, MO, and Washington County, MO.