South Korea began to implement a refugee resettlement program in 2015 by bringing in a group of ethnic Karen refugees who had fled Myanmar due to ethnic conflicts and stayed in a refugee camp along the Thailand-Myanmar border. About 90 Karen refugees arrived from 2015 to 2017 through the resettlement program while South Korea turned to other Burmese refugees in Malaysia under the program in 2018. Those resettled refugees underwent an intensive training course that focused on language in the Immigration Reception Center in Yeongjongdo, Incheon for six to twelve months under the full support of the government. On completing the course, they moved to Bupyeong, Incheon and began to stand on their own foot. While they were facing a lot of problems associated with language, culture, education, health and work, the existing Karen community that is dominated by Christians actively engaged in assisting resettled refugees’ adjustment to Korean society in close cooperation with a Korean local church. In turn, the arrival of resettled refugees has strengthened the capacity of the ethnic community so that it could start the Karen church and come up with various programs including Karen language education. This study investigates how resettled refugees’ integration into Korean society centers on religion, in particular Christianity and how they rebuild their lives in a totally different living environment from their homeland and refugee camps.