The article is devoted to the issue of project management implementation by public management bodies of the decentralized system of territorial organization of power, in particular the functional features and advantages of implementing project management tools in the activities of united territorial communities of Ukraine. It is determined that the project approach to project management today is one of the most popular ways of management in the modern world. The relevance of the widespread introduction of project management methodology and project approach in the practice of public administration as a new culture of management and effective tools for good governance in a crisis, instability and uncertainty is substantiated, solving industrial, scientific and social problems. It was concluded that the use of project management methodology at the national level of the decentralized system of territorial organization of power is both strategic and tactical in nature. In strategic terms, the project approach makes it possible to focus the efforts of public authorities on solving urgent problems of long-term development of society in its key areas, reducing tensions in the socio-political sphere, by increasing the efficiency of public authorities to strengthen their legitimacy and resilience to internal and external threats establish a stable partnership dialogue with communities and civil society institutions. In terms of tactics, budget savings, reduction of implementation of state programs and national projects, some optimization of government structures and improved coordination of public authorities, cooperation and public-private partnerships with business entities.