Least racially diverse, US states · 2020
US states with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2023 ACS). Maine leads at 20. 51 states qualify in total.
Flip the list · Most racially diverse, US states →UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which state has the lowest diversity score?
Maine ranks #1 with 20 (2020 American Community Survey).
What are the top 5 states by diversity score?
Maine, Vermont, West Virginia, New Hampshire, Montana.
How many states are in this ranking?
51 states qualify after filtering for population minimums and data availability. The ranking covers 2020 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 (2020).