This study examined the relationship between marital warmth (e.g., openly expressing affection, supportive behaviors) and assessments of coping (i.e., challenges coping with military life and self-efficacy in the context of stress) and mental health (i.e., depressive symptoms and anxiety symptoms) in a sample of active duty men and their spouses/romantic partners (N = 234 military couples). Results from a series of multivariate analysis of variance tests indicate that service members and spouses who reported higher levels of marital warmth also reported better coping skills and mental health compared to individuals in couple relationships that demonstrated lower levels of marital warmth. Intervention and prevention implications targeting social support and marital warmth are provided.