In July 2013, the ECDC surveyed 50 states and the District of Columbia to assess state early childhood data systems. The survey, completed by state education, health, and social services staff, focused on these three key aspects of state data systems, taken from ECDC's 10 Fundamentals: Do states have the ability to securely link child-level data across ECE programs and to other state data systems, including K-12, health, and social services? Do states collect developmental screening, assessment, and kindergarten entry data to examine children's developmental status and service needs? Do states have an ECE data governance structure designated to support the development and use of a coordinated longitudinal ECE data system? (author abstract)