This brief highlights research about the relationship between program quality and the inclusion of young children with disabilities in Head Start and other early childhood programs. After an explanation of the U.S. DOE/DHHS joint policy statement on inclusion of children with disabilities in early childhood programs, there is a summary of the evidence and discussions about the following issues: access to inclusive settings, impact on families, the relationship between quality and inclusion in early childhood, the importance of best practices and health system coordination, inclusion and quality rating and improvement systems (QRIS), and recommendations for the future. A table displays descriptions of inclusion-related indicators in QRIS or QIS in Colorado, Illinois, Maryland, and Washington State.