Constitutionalism and the Regulation of Religion in Nigeria: Balancing Secularism and Religious Freedom

Nigeria's constitutional framework simultaneously guarantees freedom of religion under Section 38 of the 1999 Constitution and prohibits the adoption of a state religion, yet the state's relationship with religious organisations and practice is deeply contested across its geopolitical zones. The expansion of Sharia criminal law in twelve Northern states and the growing political influence of Pentecostal Christianity in the South raise fundamental questions about Nigeria's constitutionally mandated secular character. This research analytically examines the constitutional regulation of religion in Nigeria, assessing the legal boundaries of permissible state engagement with religion, the scope of religious freedom guarantees, and the judicial management of religion-state conflicts. A doctrinal and comparative constitutional methodology was employed, drawing on judicial decisions from the Supreme Court, Court of Appeal, and ECOWAS Community Court from 2015 to 2024. Comparative analysis draws on constitutional religion jurisprudence from India, Senegal, and South Africa. Secondary sources include constitutional law scholarship, religious freedom reports from the United States Commission on International Religious Freedom, and academic political theology literature. The study develops an original analytical framework for evaluating Nigerian religion-state relations against a pluralist constitutionalist standard. Findings reveal systematic tensions between constitutional secularism and the practical entanglement of state institutions with religious organisations at federal and state levels. The research contributes original analytical value to the constitutional law of religion literature in Nigeria. Keywords: constitutionalism, religious freedom, secularism, Sharia, Nigeria.