Highest Slovak population share, US counties
US counties ranked by the share of all residents who are Slovak ancestry (2023 American Community Survey). A concentration measure: Slovak residents as a percentage of total population. Mahoning County, Ohio leads at 5.1%. 1,817 counties qualify in total. Pennsylvania carries 15 of the top 25 entries.
UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest slovak share?
Mahoning County, Ohio ranks #1 with 5.1% (2024 American Community Survey).
What are the top 5 counties by slovak share?
Mahoning County, Ohio, Cambria County, Pennsylvania, Westmoreland County, Pennsylvania, Fayette County, Pennsylvania, Luzerne County, Pennsylvania.
How many counties are in this ranking?
1,817 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is slovak share measured?
Share of all residents who are Slovak ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2024).