Background Meta analysis has shown that immigrant women are twice as likely to display postpartum depression (PPD) symptoms than non-immigrant women yet, the reason behind this increased risk is unknown. This review sets out to synthesize existing research on PPD in immigrant women and illuminate gaps for future research. The research question guiding this review is: what are the factors that impact postpartum depression (PPD) risk among immigrant women in the U.S.? Methods APA PsychInfo was searched on 24 February 2025 for studies assessing the risk factors of PPD in immigrant women in the U.S at any time. Only primary, observational studies were included. Results were narratively synthesized, grouped by risk factor type and further divided by specific risk factor. Results Five studies were included, representing 506 participants. The mean age of participants ranged from 29-33.4 and the mean years living in the U.S. ranged from 5.56-10. All included studies focused on immigrant populations originating from Asian and Middle Eastern countries. All studies utilized validated PPD measurements. Two of five studies reported on acculturation; one reported that lower levels of acculturation related to higher levels of PPD symptoms, whereas the other found no significant correlation. Two of the five included studies reported on social support and all found that lower levels of social support were associated with higher levels of PPD symptoms, suggesting social support may be an important risk factor to consider. Two studies reported on family dynamic descriptors including marital relationship, in-law relationship, arranged marriage, and child’s gender. Only marital relationship scores had significant associations with PPD scores. Two studies reported on mother’s mental health and confidence. One study found antenatal anxiety, antenatal depression, life stress, and maternity blues all increase PPD symptoms; while the other study found that low maternal self-efficacy was related to higher PPD symptoms. Conclusion The literature examining risk factors for PPD in immigrant women living in the U.S. is minimal. Data suggests strong associations between low social support and increased PPD symptoms. More research should be conducted to assess the impact of acculturation of PPD, as results are conflicting. Finally, future research should be done in immigrant populations from various countries of origin as current research heavily focuses on Asian and Middle Eastern countries.