Largest British population, Iowa counties

Iowa counties ranked by the number of residents who are British ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 94 counties in Iowa that qualify, ranked against each other statewide. The median across all 94 is 34. Biggest climber in the top 100 since 2020: Buena Vista County, IA, up 53 places to #32.