This study reconsiders the concept of transnational religious identity and explores its implications for cultural policymaking in the Islamic Republic of Iran. Using a qualitative-interpretive analysis of selected Qur’anic verses (al-Hujurat:13; al-Anbiya:92; al-Rum:22; Al ‘Imran:103, 95) and classical commentaries, the research identifies a Qur’anic model of identity. This model emphasizes the unity of human origin and purpose, the universality of divine mission, human diversity as a divine sign enabling mutual recognition (ta’aruf), and piety (taqwa) as the sole measure of dignity. It also introduces the idea of a transnational faith-based community (ummah wahida), unity through holding to God's rope, and the concept of millah as a monotheistic path. While recognizing ethnic, national, and linguistic diversity, the Qur’an prioritizes a piety-based religious identity as the superior standard. Strategic implications for cultural policy include promoting Islamic brotherhood and human dignity across borders, managing cultural-linguistic diversity, rejecting prejudice through piety, reinforcing Islamic solidarity, and fostering a Qur’anic understanding of nationhood. Applying these principles in education, media, cultural diplomacy, and the arts can help build a cohesive Islamic society.