Largest Welsh population, US counties · 2010
US counties ranked by the number of residents who are Welsh ancestry, from the 2023 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. Los Angeles County, California leads at 28,387. 2,972 counties qualify in total. California carries 6 of the top 25 entries.
UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest welsh population?
Los Angeles County, California ranks #1 with 28,387 (2010 American Community Survey).
What are the top 5 counties by welsh population?
Los Angeles County, California, Maricopa County, Arizona, King County, Washington, Salt Lake County, Utah, San Diego County, California.
How many counties are in this ranking?
2,972 counties qualify after filtering for population minimums and data availability. The ranking covers 2010 ACS 5-year data.
How is welsh population measured?
Number of residents who are Welsh ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2010).