The purpose of the publication is to determine the ways and components of the process of ensuring effective and efficient reform of the state administration of Ukraine as a whole and its administrative-territorial system, in particular, on the way to European integration of the country after the end of military operations on its territory. The relevance of the study is determined, on the one hand, by the desire of the people of Ukraine for its entry into the community of European countries, and, on the other hand, by the need for a certain reform of state management in accordance with the conditions of the European Union, taking into account the losses and destruction as a result of the Russian military invasion. The publication of theses regarding the substantiation of public administration reform projects aimed at the European integration direction of Ukraine was carried out based on the concept of project analysis. In accordance with the conducted research, it is proposed: a) implementation of analytical substantiation of the projects of reforms of the state administration of the country and its administrative-territorial system, which are proposed both from the legal and organizational points of view; b) conducting a step-by-step thorough analysis of the proposed reforms from the point of view of their market (marketing) expediency and technical and institutional feasibility, as well as based on the obtained results of environmental, social and financial and economic analysis for possible consequences (both current and in the distant future) of the specified proposals for reforming both the state administration of the country as a whole, and local self-government and the administrative-territorial system in Ukraine, in particular.