When establishing the White House Task Force to Protect Students from Sexual Assault, President Obama reminded universities of their obligation to report accurate rape statistics to the Department of Education. Research has not determined, on a national scale, what factors explain variation in (under)reporting. Using data from 413 top universities' websites and institutional and archival data, we examine how state- and university-level factors shape universities' rape reporting. Universities with a greater feminist presence and antiviolence activism, and those located in states where women have higher socioeconomic status and more American Association of University Women partnerships, report more rapes. We examine underreporting as an institutional rather than an individual-level phenomenon, connect campus reporting to the larger reporting literature, and provide practical policy and program implications.