Largest Scotch-Irish population, US counties · 2020
US counties ranked by the number of residents who are Scotch-Irish 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 31,152. 3,101 counties qualify in total. Texas 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 scotch-irish population?
Los Angeles County, California ranks #1 with 31,152 (2020 American Community Survey).
What are the top 5 counties by scotch-irish population?
Los Angeles County, California, Maricopa County, Arizona, Harris County, Texas, Mecklenburg County, North Carolina, King County, Washington.
How many counties are in this ranking?
3,101 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 ACS 5-year data.
How is scotch-irish population measured?
Number of residents who are Scotch-Irish ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2020).