This study evaluates the rates and predictors of CACFP participation among licensed child care centers across the U.S. to help inform targeted efforts that expand this important program to more children in need. Administrative data from 47 states and the District of Columbia (DC) were collected to (1) estimate CACFP participation rates among licensed child care centers in each state, overall, and in low-income communities, and (2) explore predictors of center-level CACFP participation using Bayesian spatial models. The study hypothesizes that centers located in states with more resources for CACFP and food security in general— measured by the availability of more sponsoring agencies, having licensing and CACFP administered by a single state agency, greater state SNAP participation rates, and having user-friendly agency websites—are more likely to participate in CACFP. In sensitivity analyses, larger centers are expected to have a higher probability of CACFP participation owing to economies of scale. (author abstract)