After introducing the long history of transnational movements, this entry provides an overview of some of the principal transnational structures and processes of transnational movements, as well as their impacts on governments, intergovernmental organizations, and corporations. The diversity of transnational movements and their influence is emphasized, as is their significance across regional contexts. The analysis considers the latest transformations in transnational movements, and concludes with discussion of significant challenges confronting these movements in the twenty‐first century.