Researching innovative approaches to the strategic management of sustainable development of territorial communities under decentralisation conditions is relevant because management practices must be adapted to new challenges, including the consequences of the pandemic and military actions, low institutional capacity, financial constraints, and the need to address sustainable development issues at the local level. Decentralisation requires local governments to have effective management strategies that will enhance public participation and stimulate the socio-economic development of regions. The research aims to determine innovative approaches to the strategic management of sustainable development of territorial communities in Ukraine and to study the effectiveness of the community management system under decentralisation conditions. An integral approach was applied during the research, within which the method of expert evaluations determined the level of effectiveness of the territorial community management system, and a correlation analysis was carried out with subsequent interpretation of the results using a correlation analysis matrix. To verify the objectivity of the obtained expert evaluations, a Bayesian paired t-test was conducted, and Inferential Plots were presented for indicators that had the most significant discrepancies between the evaluations of the two groups. Therefore, based on the research results, it was determined that the expert evaluations are objective, and the effectiveness of the strategic approach to implementing functions within the territorial communities and their overall management system under decentralisation in Ukraine is sufficient to ensure sustainable development. According to the analysis results, there is a high level of correlation between the evaluations of the two groups of experts regarding institutional capacity and management functions of territorial communities in the indicators of Planning the participation of local authorities in community life (r = -0.24 at p = 0.25), Control of activities concerning the representation and protection of community interests by authorities (r -0.23 at p = 0.26), and Control of the effectiveness of local authority participation in community life and increasing the degree of residents’ participation in public life of the territory (r = -0.21 at p = 0.32), indicating a high level of management effectiveness in these

indicators and pointing to a general agreement on the effectiveness of the specified management functionsand institutional capacity.