Over the past three decades, the U.S. economy experienced a sharp increase in the labor-force participation of women, causing a similar increase in the demand for non-parental child care. Concurrent with these developments has been a dramatic rise in the prevalence of childhood obesity, prompting the question as to what extent the increase in child-care utilization is responsible for the growth in obesity. This chapter examines the impact of various childcare arrangements on school-age children's weight outcomes using panel data from the Early Childhood Longitudinal Study, Kindergarten Cohort (ECLS-K). An advantage of the ECLS-K for our purposes is that it tracks children's child-care arrangements between Kindergarten and the 5th grade. Our fixed-effects' results suggest that non-parental child-care arrangements are not strongly associated with children's weight outcomes. Our findings are robust to numerous sensitivity and subgroup analyses.