The study is relevant due to the growing problem of the increase in the number of internally displaced persons (IDPs) in Ukraine under the conditions of Russian aggression in 2022-2024, who remain in fact without a permanent residence, a place of work and have difficulties in ensuring the normal life of their families in the new circumstances. The purpose of the study is to clarify the list of levers in the system of public management of social protection of IDPs that are capable of increasing the effectiveness of the mechanism of providing this category of population with sufficient support in matters of housing options, employment, health care services, etc. The article examines the peculiarities of public administration in the system of ensuring social protection of people classified as IDPs under the conditions of martial law in Ukraine. The management tools used at the local level to support IDPs were comprehensively analyzed, with the development of recommendations for improving the social security system in terms of housing conditions, food, medical care, and employment of such persons at the regional level. The article defines the peculiarities of the category of internally displaced persons, analyzes international standards and national legislation on the social protection of internally displaced persons, and identifies key trends and directions of its development. The foreign experience of public administration in the social protection of IDPs is summarized with an analysis of the national features of support for this category of population inherent in different countries. Recommendations for improving the public management system in the social protection of IDPs have been developed for the Sumy territorial community. The practical significance of the research is determined by the possibility of their use by local executive authorities and local self-government bodies in the development and implementation of support programs for internally displaced persons. The proposed recommendations can be applied in the activities of structural subdivisions for the social protection of the population, and public organizations that support IDPs.