This dissertation examines the factors that influence the attitudes of teachers and administrators at independent schools affiliated with the National Association of Independent Schools (NAIS) regarding inclusion of students with disabilities. The author administered surveys to 82 administrators and 440 teachers at NAIS schools to understand their attitudes. The findings suggest that teacher training and perceived burden of inclusion are the two most significant factors influencing attitudes. Administrators had more favorable attitudes toward inclusion than teachers. There were also discrepancies between administrators and teachers in their perceptions of the supports available for inclusion. Recognizing these influencing factors and discrepancies could help improve independent schools' practices around inclusion.