This brief provides the results of an analysis of WIC vendor selection and authorization criteria, and operations and management policies established by the 89 administrative agencies in the United States. This study is the first to compile and examine a database of WIC vendor selection and authorization criteria, and operations and management policies established by the 89 administrative agencies in the United States. Results demonstrate that vendor selection and authorization criteria vary across WIC agencies without any consistent pattern. These findings are important because limiting the landscape of WIC vendors may have substantial impacts on communities and may result in reduced access to WIC-approved foods by WIC participants.