Evaluating the Effectiveness of Yoruba Language Broadcasting on Ogun State Radio: An Administrative Assessment

State broadcasting services carry a public mandate to promote indigenous languages, yet systematic administrative evaluation of their Yoruba-language programming effectiveness is rarely conducted. This study evaluates the effectiveness of Yoruba language broadcasting at Ogun State Broadcasting Service (GBC), South West Nigeria, from an administrative and professional management perspective. Using a mixed-methods evaluation design, data were collected through listener surveys administered to 250 residents across Abeokuta, Sagamu, and Ijebu-Ode, alongside management interviews with GBC programming directors and broadcast officers. The study applies programme evaluation theory and broadcasting policy analysis to assess listener reach, content quality, language standard compliance, and audience satisfaction. Existing evaluations of Nigerian state radio broadcasting have focused on technical coverage and financial sustainability, with language quality and cultural programming effectiveness receiving limited systematic attention. This study addresses that professional assessment gap. The research examines whether GBC's Yoruba programmes conform to standard Yoruba phonological and grammatical norms, whether programme content reflects contemporary Yoruba cultural concerns, and whether broadcasting schedules maximise reach to target audiences. Findings are expected to reveal listener satisfaction with entertainment programming but significant concerns about language quality in news broadcasts and the underrepresentation of younger audience demographics. Recommendations will address professional broadcaster training, programming policy revision, and community feedback mechanisms for state radio Yoruba broadcasting. Keywords: Yoruba broadcasting, Ogun State radio, programme evaluation, media management, language policy.