A study from Brown University has evaluated diversity in the U.S., and it has listed the most and least diverse cities throughout the nation. The Vallejo-Fairfield land places first, followed by San Francisco, Stockton, and the Washington D.C. area. Los Angeles places ninth. In terms of least diverse, the city of Laredo, Texas comes in atop. Parkersburg-Marietta-Vienna, West Virginia - Ohio and Altoona, Penn. follow.

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