I came the below chart from the latest Census data showing the largest, second largest and third largest race or ethnic group in each state of the country. In a handful of states minorities are the majority in terms of population size. For example, in California the largest ethnic group is not White, but rather Hispanic or Latino. Whites are the largest group in states like Maine, Wisconsin, Vermont, West Virginia, Idaho, Montana, etc. at over 75% of the population.
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Source: US Census Bureau