Objective: To evaluate population-level implementation of Confident Body, Confident Child (CBCC); an evidence-based program providing parenting strategies to promote healthy eating, physical activity and body satisfaction in children aged 2-6 years; with community child health nurses (CHNs). Methods: This study utilised an implementation-effectiveness hybrid design, with dual focus on assessing: (a) CBCC implementation into Child Health Centres at a regional health service in Queensland, Australia (process evaluation); and (b) CBCC’s effect on CHNs’ knowledge and attitudes (outcomes evaluation). Process (CBCC reach, dose, fidelity) and outcome data (CHN knowledge of child body image; and attitudes towards higher body weights) were collected during implementation, and pre- and post-intervention delivery to CHNs, respectively. Results: Twenty-six CHNs (all female; mean age 52.7 ± 9.5 years) participated in the study by attending a 1-day CBCC training workshop and completing demographic and outcome surveys. Process evaluation found that CBCC was implemented as planned and reached 56% of CHNs across the health service. Outcome evaluation showed small but non-significant improvements in CHN knowledge (P =.077) and attitudes towards overweight (using Anti-Fat Attitudes scale; significant improvements on willpower sub-scale only (P <.05)). Discussion: This is the first study to evaluate population-wide CBCC implementation in a real-world health service setting with CHNs. Findings highlight the potential for using pragmatic, implementation-focused methodologies to translate preventive eating disorder programs into community child health services.