South Korean society is in transition toward a multicultural society. Integrating multicultural education into current citizenship education is challenging for the society. Historically, many national tragedies have created the unique characteristics of what being Korean means. South Korean social studies curriculum emphasized that Korea is a monolithic society with one language, one history, and one ethnicity. In recent years, however, the number of foreigners living in South Korea dramatically increases because of work, study, and marriage. As they become be members of Korean society, it is necessary that South Koreans acknowledge diverse groups in the society and revise a long-held belief about who we, as Koreans, are. To this end, the Korean social studies curriculum should include more information about as well as respect and promote ethnic, cultural, and social diversity. Social studies teachers should attempt various activities to promote students' understanding of current social changes in South Korea.