The literature on multi-level governance (MLG) and the field of the administrative sciences and public administration (PA) can be fruitfully integrated in order to generate knowledge about “the administrative dimension of MLG.” MLG may be defined by Piattoni as “the simultaneous activation of governmental and non-governmental actors at various jurisdictional levels” and perspectives derived from MLG may be applied to a wide set of issues spanning from political mobilization (politics), to policymaking (policy), to state restructuring (polity). It is along each of these sets of issues that it is possible to delineate the contribution that the field of PA can provide to the development of MLG. To MLG as political mobilization, the PA literature brings insights about participatory approaches and collaborative governance. To MLG as policy in multi-level settings, the PA literature brings insights about the functioning of multi-level administration and the role of a multi-level bureaucracy in policymaking processes occurring in compound political systems; the PA literature also contributes insights on public accountability in systems where decision responsibility is blurred, and issues of legitimacy arise. To MLG as polity restructuring, the PA literature offers insights on the administrative dimension of polity restructuring processes, as well as on the dynamics of systemic change and the change management of public governance arrangements. The study of MLG may benefit from drawing from a range of conceptual tools and models developed in the field of PA. Complementarily, PA as an interdisciplinary field of scholarship may benefit from the perspective of MLG, which provides it with a platform to expand the application of concepts like those of collaborative governance; bureaucratic influence on policymaking; public accountability in multi-actor, multi-level settings; or systemic-level change management. In this sense, the generation of knowledge about the administrative dimension of MLG is an addition to both MLG studies and to the field of PA.