Least racially diverse, US counties
US counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2024 ACS). Blaine County, Nebraska leads at 0. 3,144 counties qualify in total. Kentucky carries 6 of the top 25 entries. The median across all 3,144 is 41.
Flip the list · Most racially diverse, US counties →UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the lowest diversity score?
Blaine County, Nebraska ranks #1 with 0 (2024 American Community Survey).
What are the top 5 counties by diversity score?
Blaine County, Nebraska, Oliver County, North Dakota, Petroleum County, Montana, Rock County, Nebraska, Dickenson County, Virginia.
How many counties are in this ranking?
3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is diversity score measured?
CensusEasy Diversity Score (0 to 100): the chance that two random residents are of a different race or ethnicity, rescaled so 100 is a perfectly even split across all five groups. A Simpson diversity index over the five ACS race and ethnicity shares. Source: US Census Bureau, American Community Survey 5-year estimates (2024).