AbstractParent‐Child Interactions (PCI) is a home visit parenting intervention designed to promote positive parenting and deter punitive approaches to child behavior management. With attention to the importance of providing efficacious interventions for families from diverse backgrounds, this study used a subsample from a larger randomized controlled trial (RCT) to examine the efficacy of PCI intervention among Latinx participants. PCI was offered to 170 at‐risk Latinx mother–child dyads, of whom the majority were primarily Spanish speaking. Dyads were randomly assigned to an intervention or a wait‐list control condition. Path analysis modeling was used to examine parenting outcomes as a mediator of program efficacy between group assignment and children's long‐term functioning. Results suggest that Latinx parent and child functioning benefited from PCI intervention 6 months following intervention. Specifically, model results indicated significant indirect effects of the PCI intervention on (1) cooperative child behavior and (2) children's externalizing behaviors 6‐months posttreatment via parenting at post test, with mother–child dyads assigned to the treatment condition, relative to the control, demonstrating better functioning 6‐months posttreatment. Overall, findings contribute to increased understanding of parenting intervention implementation among Latinx families.Recommendations for future study are discussed.