Executive Summary Student mental health has become a pressing concern across both secondary and postsecondary education. Rising rates of anxiety, depression, and psychological distress are placing increasing strain on schools, colleges, families, and public health systems. While institutions have expanded counseling services, crisis response, wellness programming, and training initiatives to address student mental health, these approaches remain largely reactive and insufficient to meet the current level of student mental health need. This white paper examines psychosocial factors associated with student mental health, with the goal of identifying early, preventive indicators that can inform scalable and policy-relevant solutions. Using validated, low-burden measures administered through an anonymous, nonprofit-developed psychosocial check-in, this study analyzes data from 152 college students recruited through a national academic network spanning multiple institutions. Patterns observed in this sample align closely with recent national assessments of college student mental health, which indicate that 37% of U.S. college students report moderate or severe depressive symptoms and 33% report moderate or severe anxiety symptoms (Healthy Minds Network, 2025), with similar patterns documented in national campus health surveillance data collected by U.S. institutions (American College Health Association, 2026). Key Findings 27% of students met criteria for serious psychological distress, indicating substantial unmet mental health need. Belonging uncertainty emerged as the strongest psychosocial correlate of mental health, exceeding perceived social support and growth mindset. Psychosocial factors accounted for nearly one-third of differences in student mental health outcomes, emphasizing the influence of modifiable experiences. More than 90% of students reported that a resource-linked psychosocial check-in would be helpful, supporting feasibility and acceptability. These findings indicate that belonging functions as a central mental health factor, not merely an engagement or inclusion issue, and instead supports early, preventive, and scalable psychosocial strategies.