This study examines the intersection of identity politics, local wisdom, and millennial engagement in fostering social cohesion in North Sumatra, Indonesia. Against the backdrop of ethnic and religious diversity, identity politics has often served as a tool for polarization, particularly during elections, targeting vulnerable millennial demographics. Utilizing a qualitative approach with in-depth interviews and focus group discussions, this study highlights how local wisdom values, including gotong royong (mutual cooperation) and Dalihan Na Tolu (Batak cultural values), support social harmony and mitigate divisive identity-based narratives. These findings underscore the unique potential of millennials to bridge social divides if they engage in community programs that incorporate these values. Additionally, this study proposes an innovative education model that integrates local wisdom and digital technology to enhance millennials’ awareness and resilience against identity politics. This approach enhances social cohesion and positions millennials as agents of positive social change. This study contributes to the broader discourse on multiculturalism, identity politics, and generational roles in national unity within Indonesia’s socio-political landscape.