This dissertation illustrates the cultural dimension of globalization by examining how the ascendance of South Korean popular culture, i.e., the Korean Wave, reshapes the global imagination and transforms the locality of Korean Americans in Philadelphia. As an ethnographic global media study, I conducted in-depth interviews and participated in Korean cultural events/meetings, as well as visited the sites of living for Korean Americans in the Philadelphia metropolitan area. My research finds that advances in the digitalized media environment made my informants consume copious transnational Korean media every day and individualized their media consumption. Accordingly, their perceptions of Korea/Asia/U.S.’s places in the world are complicated and their ethnic identity has become significant. Their global imaginations also intersect with negotiating gender roles, perceiving attractiveness, and planning future paths. This shift contributes to construction of the in-between identities of Korean Americans by denaturalizing ideas and cultural elements in both Korea and the U.S. Most distinctively, the rise of the Korean Wave stimulates global imagination among young second generation Korean Americans to aspire to and operate their agency in a transnational context that their parents’ generation barely anticipated. Finally, the upsurge of the Korean Wave drives Korean Americans to participate in transforming localities rooted in thickened connectivities and activities centering on Korean popular culture across intra/inter-ethnic groups locally and globally. This conversely facilitates intense engagement and belonging in the local spaces of community among Korean Americans. My study shows how transnational media flow under conditions of globalization positively influences immigrants to embrace their own ethnic identities and local spaces. On the other hand, it implies that there should be further examination of different boundaries of global imagination rooted in gender/class differences as well as race/ethnicity. / Media & Communication