The Turkish Radio and Television Corporation (TRT), established in 1968 as Türkiye’s public broadcaster, has played an active role in the country’s modernization process. Since 1972, TRT has broadcast in line with general broadcasting plans that define institutional program policies. Examining these plans offers insight into the relationship between television and secularization in Türkiye. This study examines the broadcasting principles of religious programs in TRT’s general broadcasting plans from 1977 to 2004. The introduction draws on official documents and relevant literature, followed by a content analysis dividing religious broadcasting principles into two categories: “reductive references” and “exclusionary references”. Within reductive references, the themes of “laicism/secular worldview” (95.5%), “social/national unity and solidarity” (90.9%), and “social, cultural, and economic progress” (86.4%) were predominant. Among exclusionary references, “offending religious feelings or religious abuse” appeared at 63.6%, “evoking political movements” at 50%, and “contrary to reason, logic, and scientificity” at 40.9%. The findings indicate that TRT’s religious broadcasting principles reflect a limited representation of Islam shaped by Türkiye’s distinctive secularism policies.