Largest Welsh population, Colorado counties

Colorado counties ranked by the number of residents who are Welsh 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 59 counties in Colorado that qualify, ranked against each other statewide. The median across all 59 is 117. Biggest climber in the top 100 since 2020: Lake County, CO, up 34 places to #25.