This report presents results from the Mental Health Client-Level Data (MH-CLD) and Mental Health Treatment Episode Data Set (MH-TEDS) for individuals receiving mental health services from state mental health systems in 2020, as well as selected trends in data collected from such individuals between 2015 and 2020. The report provides information on mental health diagnoses, mental health treatment settings, and demographic and substance use characteristics of individuals in mental health treatment in facilities that reported to individual state administrative data systems.