Purpose: Considerable research has noted the association between ethnic identity commitment, which refers to a positive affirmation, sense of belonging and heightened level of engagement to one’s ethnic group, and indices of well-being, but less is known in terms of factors that can explain this link. Research Design: The current study explored the relationship between ethnic identity commitment and indices of well-being, the mediating role of social relationships, and the moderating roles of gender and immigrant generation status. Study Sample: A sample of 707 Latinx college students (79% female, 21% male, M age = 19.08 years, SD age = 1.17, Range: 17.00–25.00) reported on ethnic identity commitment, maternal and peer relationship quality, self-esteem, depressive symptoms, and anxiety. Results: Results suggested that ethnic identity commitment was positively associated with socioemotional well-being. Although both types of relationships were significant mediators on their own, maternal relationship quality had a greater influence. Furthermore, gender and immigrant generation status were not significant moderators of these indirect effects. Conclusions: Findings indicate that committing to one’s ethnic identity enhances socioemotional well-being. They also demonstrate the complex interplay of social relationships and the enduring influence of maternal relationships during early adulthood. Results support the development of efforts geared toward facilitating ethnic identity commitment as well as leveraging the impact of social relationships in a manner that supports Latinx individuals.