The Center on Enhancing Early Learning Outcomes (CEELO) reviewed data on 21 states' principal licensure requirements, conducted structured interviews with experts on principal preparation and professional development in 7 states, and spoke with staff at the National Association of Elementary School Principals and the National Institute for School Leadership. Our research reveals an array of administrator licensure titles assigned to grade-level authority across states, some permitting principals or administrators the flexibility to oversee programs ranging from early childhood through high school. To date, only Illinois has included early childhood content specifically in their licensure and accreditation processes. Early childhood content is not a required element of principal preparation or professional development for principals in most states, according to our findings. Very few states have any formal requirement for early childhood content in licensure for principals responsible for early education programs. Some states have developed policies and programs that acknowledge a need for integrating early childhood content (DE, IL, MD, NJ, PA, WA), but very few have progressed beyond initial stages of providing training or outlining policies. An appendix presents the Principal Interview Protocol. Acknowledgement and endnotes are also provided.