This research examines the integration of local wisdom and digital technology in the sustainable tourism development of Lake Toba, Indonesia. The purpose of this study is to explore how the combination of local cultural heritage and digital tools can contribute to the sustainable management of tourism resources in the region. The research aims to provide insights into the role of technology in promoting cultural tourism while preserving the authenticity of local traditions and the environment. A qualitative research approach was employed to gather data through in-depth interviews and focus group discussions (FGD). A total of 15 informants, including tourism managers, local community members, and government officials, were involved in the study. Data were analyzed using thematic analysis to identify key themes and relationships between the integration of local wisdom and digital technology in the context of sustainable tourism. The results indicate that digital technology, particularly social media platforms and mobile applications, plays a significant role in promoting Lake Toba as a tourist destination, improving accessibility, and enhancing tourism experiences. However, the study also found that the integration of digital tools must be done carefully to avoid commodifying the local culture and to ensure the preservation of traditional values. Furthermore, the research highlights the importance of local community involvement in tourism management, as local wisdom is essential in maintaining the cultural identity and environmental sustainability of the area. This study contributes to the understanding of how the balance between digitalization and cultural preservation can create a sustainable tourism model that benefits both the local community and the environment. The findings suggest that collaborative efforts between local communities, tourism managers, and government institutions are necessary to promote sustainable tourism that respects local culture and promotes environmental conservation.