Introduction. The study of the population's mental health outlines a systematic analysis of the study's results on the determinants of its impact and the identification of potential determinants for building effective mechanisms to reduce their adverse effects. In Ukraine, the state of mental health of the population is affected by such global factors as full-scale military operations.

Objective. To study the role of public (social) determinants in influencing the state of mental health of the population during the war in Ukraine.

Materials and methods. The study was based on a survey of healthcare professionals to assess the level of influence of social determinants on the state of mental health of the population. The research methods used were bibliosemantic and sociological surveys, and two statistical analysis methods were a description of the study and an analysis of the facts obtained.

Results. It has been established that the critical social determinant of the impact on the state of mental health in Ukraine is the war with Russia. Based on this, the authors identified specific determinants that are closely related to this fact, namely the impact of the political situation, the effectiveness of public administration, the level of democracy, social conflicts, the organization of social protection, inflationary processes, corruption, migration processes, crime, and the organization and accessibility of the healthcare system. The assessment results showed that, according to healthcare professionals, the state of mental health is most affected by such factors as corruption (3.71±0.07 points out of 5 maximum), inflationary processes (3.58±0.07), and political situation (3.54±0.07). Respondents with less than ten years of work experience scored highest for all these factors. Social determinants: "Social conflicts in the environment," "Organization of social protection of the population," "Crime," and "Migration processes" were significantly more often mentioned by healthcare workers with up to 20 years of work experience than with more than 20 years of experience. Heads of healthcare facilities primarily pointed to the influence of such social factors as "Corruption" (3.81±0.14), "State of organization and accessibility in healthcare system" (3.74±0.13), "Political situation" and "Efficiency of public administration" (3.54±0.14 and 3.54±0.15, respectively).

Conclusions. The critical social determinants that affect the population's mental health are corruption in the state, inflationary processes, and the political situation. The correlation between the length of service and the position held regarding the level of assessment of the impact of social factors is revealed.