The dissolution of marriage generates complex legal, social, and emotional consequences, particularly for children who often emerge as the most vulnerable parties in custody disputes. This article critically examines the legal framework governing child custody after dissolution of marriage in Nigeria, with particular focus on Obio-Akpor Local Government Area of Rivers State. Adopting a doctrinal legal research methodology supported by contextual case-study analysis, the study interrogates statutory provisions, judicial authorities, and institutional practices relating to custody determination and enforcement. It further undertakes a comparative analysis of the legal frameworks of the United Kingdom and South Africa to identify best practices relevant to reforming Nigerian custody law. The study finds that although Nigerian custody law is normatively anchored on the welfare principle and the best interest of the child doctrine, substantial implementation challenges persist. These include excessive judicial discretion, absence of structured welfare assessment criteria, weak enforcement mechanisms, socio-cultural interference, and inadequate institutional support. The realities in Obio-Akpor demonstrate how urbanisation, economic instability, customary expectations, and gendered social norms frequently complicate custody outcomes. The article argues that the current legal framework, while doctrinally progressive, remains institutionally inadequate in practice. It recommends the adoption of a statutory welfare checklist, establishment of specialised family courts, strengthened social welfare institutions, mandatory mediation mechanisms, and enhanced enforcement systems. The article concludes that the effectiveness of custody law should be assessed not merely by statutory compliance but by its practical capacity to safeguard the dignity, welfare, stability, and developmental future of the child.