Against the background of existential challenges to its existence as a state, Ukraine under martial law continues to ensure national security, civil and social protection of the population, functioning of education, economy, industry, transport and infrastructure, to perform emergency rescue, construction, repair and restoration work, to overcome various crises phenomena More than a year has already passed since Ukrainian society and the system of public (state) administration have been operating under martial law. In the extremely difficult conditions of martial law, Ukraine is forced not only to defend its independence and territorial integrity, but also to support the economy, social sphere, infrastructure restoration, emergency rescue and construction works, overcome many other crisis phenomena in various spheres of social life and public (state) management. The need to solve, under such extreme conditions, a complex of urgent problems in various spheres of public (state) administration and public life is inevitably connected with increasing the requirements for the level of professional competence of managers and other personnel not only of military administration bodies, but also of state authorities, local selfgovernment bodies, state and communal enterprises, institutions and organizations on sectoral and inter-sectoral public (state) management under martial law. The article is devoted to the analysis of the peculiarities of the functioning of the system of public (state) administration in the conditions of martial law. The works of well-known specialists in public administration, strategic planning, geopolitics, and national security were analyzed. The legislative basis for the introduction of martial law was considered, as well as the peculiarities of the construction and functioning of the system of public (state) administration in wartime. The construction of the system of public (state) administration in wartime is analyzed. The scheme of the organization of the system of public (state) management in the martial law regime, and its variant, as well as the system of leadership of the Armed Forces of Ukraine and other military formations of the state at the strategic level, is given.