Transnational administration is the routinization and bureaucratization of global governance. Concepts of transnational administration move beyond methodological nationalism and absolutist understandings of administrative sovereignty vested solely with nation-state authorities to articulate various administrative arenas of global policy. Transnational administration is a new “third scale” of public administration. The first two scales of public administration are national administration, and its internationalization due to globalization, and the international public administration located in the secretariats of international organizations. Transnational administration incorporates nonstate actors in decentralized, devolved, or delegated interactions within and between policy communities operating in global and regional spheres. Organizations such as the Bank of International Settlements, the Kimberley Process, the Global Health and Partnership Model, and Transparency International highlight the actions of transnational administrative actors. Critiques of these and other organizations have raised new concerns about accountability, representation, and transparency.