The use of religious symbolism in global marketing raises complex ethical concerns due to diverse cultural sensitivities, faith-based identities, and varying regulatory environments. While religious imagery can enhance cultural meaning, brand authenticity, and community engagement, misuse may provoke backlash, accusations of blasphemy, cultural appropriation, or political tension. This study examines ethical challenges and strategic considerations for using religious symbolism in marketing across international markets. Using content analysis of 830 global campaigns, interviews with branding and ethics professionals, and cross-cultural case comparisons, the study identifies patterns in how religion influences branding perception across Christianity, Islam, Hinduism, Buddhism, and Indigenous spiritual systems. An ethical evaluation framework is proposed to guide responsible use of religious symbolism.