The article is devoted to the reform of local self-government and territorial organisation of power in Ukraine, which took place in 2014–2020, combining three important tasks: improving the system of public authority, strengthening local self-government, and streamlining the administrative-territorial system in the state. The analysis conducted in the study concerns: the main problems to be addressed by the relevant reform; the chronology of the adoption of key regulations and their role in this process; the results of the amalgamation of territorial communities; and the communities’ ability to ensure the sustainable development of territories. As a result, the article highlights the stages of the implementation of the reform of local self-government and territorial organisation of power in Ukraine, as well as outlines several unresolved issues in this area.