According to the Western Interstate Commission for Higher Education's (WICHE's) 9th edition of its quadrennial "Knocking at the College Door: Projections of High School Graduates," released in December 2016, the overall number of U.S. high school graduates will plateau, then begin to decline, within the next decade. Further, the high school graduate population will continue to diversify, fueled primarily by decreases in the White student population combined with large increases in the number of Hispanic and Asian/Pacific Islander public high school graduates (50 percent more and 30 percent more, respectively) through about 2025. This demographic shift suggests that non-White student populations will be the key source of growth in the number of high school graduates for the foreseeable future; that growth potential is suppressed, however, by their lower-than-average graduation rates. This brief, a supplement to WICHE's December 2016 report, aims to advance the conversation on these demographic changes and offer additional detail about trends that influence higher education decision-making. In this brief, the previously published national, regional, and state race/ethnicity projections are now also disaggregated by student sex. These more-detailed projections further expose the pervasiveness of gaps in graduation rates for minority males. As the nation and many states enter a period of declining numbers of youth, improving high school graduation rates among minority males is critical to increasing overall educational attainment. [This report is a supplement to "Knocking at the College Door: Projections of High School Graduates, 9th Edition. Revised" (ED573115).]