Interpersonal communication in Nigeria is firmly grounded in indigenous oral traditions that are repositories of knowledge, history, and social values. However, dominant Western communication theories hardly grasp the richness and contextuality of Nigerian interpersonal communication. In this chapter, oral traditions as a theoretical concept are employed to explain Nigerian interpersonal communication with emphasis on their functionality for knowledge storage and transmission. It examines proverbs (Owe) as repositories of communal wisdom, folktales (Àlọ́) as tools of moral instruction, and praise poetry (Oríkì) as a means of identity reinforcement. Guided by local knowledge management principles, the study theorizes an oral tradition-informed model that captures the sophisticated communicative strategies—nonverbal communication, metaphoric speech, and contextual interpretation—underpinning Nigerian communication. The chapter also pushes to the limelight the application of this model in diverse areas like family communication, leadership communication, conflict management, and preservation of cultural heritage. Drawing a comparison between indigenous communication principles and dominant Western theories, the chapter stresses the importance of de-Westernized scholarship in African studies. It advocates for the recognition and establishment of Nigerian oral traditions as one of the theoretical foundations of interpersonal communication, stressing their relevance to contemporary information environments and future research in indigenous knowledge systems.