The Karo tribe is one of the ethnic groups indigenous to North Sumatra, Indonesia. This tribe is very well known for its rich culture and traditions as well as rice and spice agriculture, especially in the hilly areas. However, within the Karo tribe, which is primarily characterised by its rich indigenous traditions, there exists a minority population of Muslims who face significant challenges in balancing their beliefs with the enduring customs of their ancestral culture. These people represent a rare combination of religion and culture as they try to address the needs of both communities. The purpose of this study is to examine the balance between Islam and Karo tribal traditions. The rationale had been that this study would offer numerous opportunities that enhance understanding of the cultural dynamics of this society. In conclusion, the analysis of the practice of the Islamic faith and the cultural practices of the Karo tribe demonstrates a complex and dynamic aspect that contributes towards both personal and social identities in society. As for the recommended directions, the authors should focus on examining in more detail which Islamic teachings affect rituals and practices of everyday life of the Karo people, especially concerning gender and family roles.