None of the households in Johnson County, IA 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.
94.8% of the residents in Johnson County, IA are U.S. citizens.
Johnson County, IA borders Benton County, IA, Cedar County, IA, Iowa County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, and Washington County, IA.