LAY SUMMARY Military family caregivers (MFCs) can experience many health-related challenges associated with caregiving responsibilities. Perceived support from a spouse or partner can influence dyadic satisfaction and health outcomes among those who care for a spouse or partner. This study examined the relations among social support, dyadic satisfaction, and mental (i.e., depressive and anxiety symptoms) and physical (i.e., somatic symptoms) health outcomes in a sample of MFCs. This sample consisted of 104 MFCs who were the spouse or partner of their care recipient. The findings indicate that more support predicted greater dyadic satisfaction and greater dyadic satisfaction predicted fewer anxiety symptoms. This study highlights the importance of considering relationship-focused contributors to mental health outcomes.