Students may want to consider the racial and ethnic diversity of a college campus when choosing a school. To identify colleges where students are most likely to encounter undergraduates from racial or ethnic groups different from their own, U.S. News factors in the total proportion of minority students, leaving out international students, and the overall mix of groups. The data is drawn from each institution's fall 2019 total undergraduate student body. The ethnic categories used in the calculations are non-Hispanic African-American, Hispanic, American Indian, Pacific Islander/Native Hawaiian, Asian, non-Hispanic white and multiracial (two or more races). Students who did not identify themselves as members of any of those demographic groups were classified as non-Hispanic whites for the purpose of these calculations. The formula produces a diversity index that ranges from 0 to 1. The closer a school's number is to 1, the more diverse the student population.