Korea is in transition toward becoming a multicultural society. This study assessed progress in the preparedness of Korean teachers to address diversity issues in this rapidly changing society. Analysis of diversity data from a 2011 national survey suggests that progress is being made toward making teachers more aware of developmental needs of diverse children. Moreover, data suggests that teaching experience, closer teacher-child relationships, and awareness of recent standardized curriculum may play a role in higher levels of diversity self-efficacy of early childhood educators. This study concludes with policy recommendations.