Least racially diverse, US counties · 2000
US counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2023 ACS). Slope County, North Dakota leads at 0. 3,125 counties qualify in total. North Dakota carries 8 of the top 25 entries.
Flip the list · Most racially diverse, US counties →UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the lowest diversity score?
Slope County, North Dakota ranks #1 with 0 (2000 American Community Survey).
What are the top 5 counties by diversity score?
Slope County, North Dakota, Blaine County, Nebraska, Hanson County, South Dakota, Boyd County, Nebraska, Steele County, North Dakota.
How many counties are in this ranking?
3,125 counties qualify after filtering for population minimums and data availability. The ranking covers 2000 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 (2000).