This report examines the overlap in eligibility of children and nonelderly adults for Supplemental Nutrition Assistance Program (SNAP) and Medicaid/Children’s Health Insurance Program (CHIP) benefits in 2013, prior to Medicaid expansion under the Affordable Care Act. We find that over half of children eligible for one program were eligible for both, and nearly all of the remaining children were eligible for Medicaid/CHIP. A substantially smaller share of parents and nonparents were eligible for both SNAP and Medicaid/CHIP. The report also provides state-level estimates to allow calculation of state joint program participation rates.