Objective: Racial and ethnic minority women from low-resource urban communities experience disproportionately high rates of trauma exposure. Higher rates of lifetime trauma exposure are strongly associated with subsequent psychological sequela, specifically depression and posttraumatic stress disorder (PTSD). Communal mastery is the ability to cope with challenges and achieve goals by being closely interconnected with friends, family, and significant others. Yet, it is unknown if communal mastery is protective specifically against PTSD and depressive symptoms. Method: Participants (N = 131) were Black and Latina women (88.5% Black, mean monthly income: < $750) recruited from an urban outpatient obstetric-gynecological clinic at an academic medical center. Participants completed an online questionnaire that assessed trauma history, PTSD and depressive symptoms, types of individualistic coping, social support, and communal mastery. Results: Hierarchical multiple regression models demonstrated that communal mastery is uniquely associated with fewer PTSD symptoms (β = -.23, p = .003). More severe trauma history, more use of passive coping skills, and poorer social support were also significantly associated with PTSD symptoms, explaining over half of the variance in PTSD symptoms. Although significantly correlated, communal mastery was not uniquely associated with fewer depressive symptoms (β = -.13, p = .201). Conclusions: These findings suggest that connectedness as assessed through communal mastery serves as an important shield against the effects of traumatic stress for Black and Latina women. Future research would benefit by exploring interventions that aim to increase communal mastery in order to help highly trauma-exposed racial and ethnic minority women in low-resource environments. (PsycInfo Database Record (c) 2022 APA, all rights reserved).