Religious Competition and Urban Christianity: Mapping Denominational Switching in Port Harcourt Rivers State

Christianity in Nigeria has undergone rapid expansion, diversification, and fragmentation, with denominational switching emerging as a prominent feature of urban religious life. Contrary to expectations that modernization would diminish the role of religion, Nigerian Christianity continues to thrive, particularly in metropolitan centres such as Port Harcourt. This article investigates the motivations, dynamics, and implications of denominational switching in the city, employing Rational Choice Theory as the primary analytical framework, complemented by insights from social identity and network perspectives. A mixed-methods approach was adopted, combining survey data from Christians who have switched denominations with qualitative interviews of religious leaders and practitioners. The findings demonstrate that switching is shaped by rational considerations—such as perceived spiritual benefits, social capital, and institutional opportunities—alongside cultural diversity, identity negotiations, and interpersonal networks. Although switching intensifies denominational competition and deepens ecclesial fragmentation, it also generates opportunities for ecumenical encounters and adaptive strategies within Nigeria’s plural Christian landscape. By situating Port Harcourt as a microcosm of wider African Christian transformations, the study advances the application of Rational Choice Theory to non-Western contexts and underscores both the challenges and possibilities for promoting Christian ecumenism in a competitive religious marketplace.