IntroductionWe aimed to (1) identify the prevalence of postpartum depression (PPD) symptoms using the Patient Health Questionnaire-2 (PHQ-2) and the Edinburgh Postnatal Depression Scale (EPDS), and (2) analyze the relationship between PPD symptoms and social determinants of health (SDoH). MethodWe obtained data from 1327 infant/mother dyads at 1 and 6-month well-child checks. We used Chi-square and T-tests to compare social determinants between PPD screening groups and logistical regression to construct predictive models for PPD. ResultsThe prevalence of positive PPD screens was 5–7%, but only 1.85% screened positive at both periods. Although the EPDS and PHQ-2 were correlated (Pearson 0.66), the PHQ-2 missed 65% of those identified by the EPDS. Positive PPD screens were associated with greater SDoH concerns. DiscussionOur study highlights the importance of repeated PPD screening. The EPDS detected more mothers at risk than the PHQ-2. Multiple SDoH were associated with PPD symptoms.