The number of repositories dedicated to collecting women's papers has grown substantially in the past quarter century, with no fewer than 15 established after 1990. This article analyzes that trend, arguing that activists—as well as scholars and archivists—have been at the forefront in establishing these new archives. As the fields of women's history, women's studies, and gender studies have matured, and as women's historians have broadened their vision to include diverse groups, geographic regions, and topics, significant gaps in the documentary record have become evident. Scholars, archivists, and activists have responded to that need with new collecting initiatives and new archives. The authors contend that woman-centered repositories will continue to play an important role in the archival landscape in the coming decades.