BackgroundHealth inequities related to poor diet, food insecurity, and obesity negatively affect children from low-income minority families. The USDA administers Food and Nutrition Assistance Programs (FNAPs) in Early Care and Education settings (ECEs) to safeguard the health of vulnerable children. However, the extent to which FNAPs provide an equitable food environment in ECEs remains unclear. ObjectiveExamine FNAPs’ association with young children's (2–6 years) food environment in ECE through a systematic review using the RE-AIM (Reach, Effectiveness, Adoption, Implementation, and Maintenance) framework. The primary focus is to operationalize RE-AIM in ECE context and evaluate FNAPs' association with the ECE food environment using an equity lens. Measurable outcomesFood environment dimensions were assessed at three levels: ECE setting (availability, accessibility, affordability, acceptability, accommodation); ECE provider (feeding practices); and child (dietary intake, food insecurity, BMI percentile). ResultsThe review included 38 articles (cross-sectional=30, mixed method=1, pre-post=5, longitudinal=2) with Child and Adult Care Food Program (CACFP; n = 35), Farm to ECE (n = 2), and Food Bank-ECE program partnership (n = 1). No study addressed all RE-AIM indicators. CACFP participation showed positive association with healthy food availability (n = 28), feeding practices (n = 12), child dietary intake (n = 6), and reduced risk of being overweight (n = 1). Farm to ECE interventions showed increased local food affordability (n = 1) and children's acceptance of healthy foods (n = 1). No study addressed foods served in ECEs to accommodate cultural diversity, special dietary needs, developmental disabilities, or reported child food insecurity. ConclusionCACFP emerges as the most prevalent FNAP nationally for having potential to improve ECE food availability and feeding practices, but further research is needed to address equity gaps by examining its impact on child outcomes (dietary intake, BMI percentile) across diverse geographic locations (urban vs. rural), ECE organizational structures (center-based vs. home-based), and demographic characteristics of ECE providers and children.