University administrators often strive for racial, socioeconomic, and geographic diversity in their student populations. Today, administrators face a new demographic challenge as women increasingly outnumber men in applications, enrollments, and graduation rates. This article discusses the causes and potential consequences of the growing gender imbalance and the legality of admissions policies that attempt to restore balance by giving preference to males. Using multiple analytic approaches, we test whether a public institution with increasing female enrollments responded by giving preferences in admissions to males. We conclude with insights for administrators and researchers.