Public mental health is the science of improving population mental health and wellbeing, preventing the onset of mental illness and emotional stress and bolstering resilience. Adding a public mental health perspective on young people's mental health, we guide mental health related policies and define areas of need by monitoring mental health as well as its preventive and risk factors. Mental Health Dresden-Leipzig boasts wide and profound expertise in public mental health research, with the involvement of several nationally and internationally acclaimed institutions and departments, including the Helmholtz Centre for Environmental Research Leipzig (UFZ), the Robert Koch Institute (RKI), the Department of Medical Psychology and Medical Sociology als ULMC, the Department of Psychiatry and Psychotherapy at ULMC, the Institute of Social Medicine, Occupational Medicine and Public Health (ISAP) at the Medical Faculty in Leipzig, and the Institute for Medical Informatics, Statistics and Epidemiology (IMISE) at Leipzig University. These and other institutions have (and continue to) conducted numerous epidemiological studies which also pertain to mental health (e.g. KiGGS, DEGS1-MH, EVOLVE, AgeDifferent, AgeCoDe/AgeQualiDe, AgeMooDe, Leila75+, "Housing and Living in Leipzig-Grünau", German National Cohort, LIFE-Child, LIFE-adult), which provide a strong foundation for public mental health research. Leipzig also serves as model region to map and optimize local community mental health services for severe mental disorders within the LeiP#netz (Leipzig Psychiatry Network) initiative. The RKI is Germany's public health institute and RKI collects data on non-communicable diseases, infectious diseases and (new) biological dangers, determinants of health, health behaviour, and health outcomes. The RKI draws on epidemiological mental health data in the German population (e.g. KiGGS and DEGS1-MH) and develops policy recommendations and preventative strategies for the German government.