Objective: Few studies have explored the impact of insecure attachment on college student mental health. The present study examined how anxious and avoidant attachment to a mother, father, and best friend were related to depression and resilience in emerging adults exposed to trauma. Participants: Participants included 372 trauma-exposed emerging adults, aged 18-24 (M[subscript age] = 19.64, SD = 1.62), from a university in the Midsouth, United States. Method: Participants completed an assessment battery of self-report measures to determine how maternal, paternal, and best friend insecure attachment each uniquely contribute to the variance in depression and resilience. Results: Hierarchical linear regression analyses revealed that anxious and avoidant attachment to a best friend were associated with lower resilience, but only anxious attachment to a best friend was associated with more depressive symptoms. Discussion: Findings highlight the importance of cultivating healthy relationships in a university setting to foster secure peer attachments for emerging adults exposed to adversity.