An Extension-implemented parent-focused childhood obesity intervention designed to improve family functioning around healthful eating and exercise was evaluated. Thirty-six parents and their children, aged 5-13, were randomized to a 12-week intervention condition or control condition. Intervention parents, compared to control group parents, felt more confident in promoting children's healthful eating and exercise, worried less about their children's weight, and engaged in fewer counterproductive parenting behaviors. The children of these parents, as compared to children of control group parents, lost weight and displayed better social-emotional functioning. These results highlight Extension's important role in disseminating evidence-based childhood obesity interventions.