OBJECTIVE: The present study aims to assess associations between parental depression and parental and child nutritional status and diets in Nepal. DESIGN: A cross-sectional survey conducted from June to September 2017. SETTING: This monitoring survey was conducted in sixteen of forty-two Suaahara intervention districts spanning mountains, hills and plains in Nepal. Multi-stage cluster sampling was used to sample communities in this survey. PARTICIPANTS: Women and men with a child 6-59 months of age were randomly selected (n 3158 mothers and children; n 826 fathers). RESULTS: Overall, 36 % of mothers, 37 % of fathers and 55 % of children met minimum dietary diversity, indicating that they consumed foods from at least four of seven food groups (children) and at least five of ten food groups (adults) in the 24 h prior to the interview. The percentage of children stunted, wasted and underweight was 28, 11 and 23, respectively. Only 5 % of mothers and 3 % of fathers screened positive for moderate or severe depression (Patient Health Questionnaire-9 score ≥ 10). In adjusted models, we found maternal depression was positively associated with maternal underweight (OR = 1·48, 95 % CI 1·01, 2·17). Maternal and paternal depression, however, were not associated with other indicators of anthropometric status or dietary diversity. CONCLUSIONS: Maternal and paternal depression, measured by the Patient Health Questionnaire-9, were not associated with dietary diversity or anthropometric status of fathers or children in Nepal, whereas depressed mothers were at increased risk of being underweight. Additional studies are needed to further assess relationships between mental health and nutritional outcomes.