More than one-third of all children were eligible for both Supplemental Nutrition Assistance Program (SNAP) and Medicaid/Childrens Health Insurance Program (CHIP) benefits in 2011, the most recent year of data available. Far fewer adults were jointly eligible. Reasons for the difference include childrens high poverty rates and state eligibility policies. However, joint participation rates (the percent of eligibles receiving benefits) suggest that many eligibles were not participating. In four out of five of states with available data, less than three-quarters of those jointly eligible (adults and children) were receiving both benefits. Efforts to streamline and integrate application systems have the potential to improve program reach to families in need.