Objective To determine if symptoms of postpartum depression and postpartum weight varied according to the level of breastfeeding among women of Mexican origin at 1 month and 6 months postpartum. Design We used data from a parent study in which promotoras interviewed new mothers of Mexican origin to encourage appropriate infant weight gain. We performed a secondary quantitative analysis to study the differences in postpartum weight and depression among the mothers in the study who breastfed and those who did not. Setting and Participants The study occurred in a heavily Hispanic community located in a major southwest city. The sample consisted of 150 women of Mexican origin who enrolled during their third trimesters in a local Special Supplemental Nutrition Program for Women, Infants, and Children clinic and were followed for 6 months. Methods Weight was measured at 1 month and at 6 months postpartum at home visits with validated digital scales. Breastfeeding was measured with monthly phone calls to record the level of breastfeeding according to World Health Organization criteria. Depression was measured at home visits at 1 month and 6 months by the Edinburg Postpartum Depression Scale. Results At 6 months postpartum, women who did not breastfeed had the highest scores on the Edinburgh Depression Scale, while the women who breastfed non-exclusively had the lowest scores (p = .067). Considering both time points, there was a significant difference in weight (p = .017) between women who were doing any breastfeeding and women who were not breastfeeding. Conclusions Breastfeeding, even if not exclusive, contributed to lower depression scores and significantly lower postpartum weight among this sample of Mexican American women.