This dissertation is a sociological exploration of Korean Protestant immigrant churches in the United States and the influence of Confucian traditions on them. Neo-Confucianism was accepted as the state ideology in Korea in the late fourteenth century, and its influences are still strong in Koreans' expressions of thought and worldviews, and Korean immigrants in the United States are no exception. Confucian elements are observed not only in Korean Protestant churches in Korea but also Korean immigrant churches in the United States. Thus, it can be said that Korean immigrant churches have the characteristics of a transnational religious institution. Transnationally, Confucian characteristics affect Korean churches. Further, Confucian traditions are integral to a collective consciousness for Korean immigrants, and thus their relationships and manners, based on Confucian traditions and teachings, enable them to maintain and reinforce their social solidarity. Moreover, such Confucian teachings and cultural mores are inculcated in most Koreans' habitus. As social agents, church members use symbolic capital, such as age and Confucian manners, to gain higher status in the church. In particular, age can be considered generational capital that determines and legitimizes church members' positions. Indeed, Korean Protestant churches across the Pacific can be called Confucian Protestant churches, namely, Protestant churches imbued with Confucian traditions. Korean immigrant churches are transnational and socially cohesive religious institutions that are shaped profoundly by Confucian traditions inculcated in their adherents' habitus across seas and generations. / Religion