This article examines the role of informal cross-border trade in regional integration within ECOWAS (Economic Community of West African States), specifically focusing on its impact on Namibia. A qualitative approach was adopted to review available data from ECOWAS member states' policies, academic research, and regional integration frameworks. Expert interviews were also conducted with policymakers and industry representatives to gather insights into Namibia’s specific context. Informal cross-border trade in ECOWAS is predominantly focused on agricultural products and small-scale manufacturing goods, accounting for approximately 20% of total intra-regional trade volumes. The analysis highlights the potential benefits of integrating informal sectors into formal regional policies to enhance economic growth and stability. However, it also identifies significant regulatory challenges that need to be addressed to ensure fair competition and sustainable development. Namibia should prioritise developing a comprehensive legal framework for cross-border trade, promote public-private partnerships for infrastructure improvements, and engage in capacity-building initiatives among small-scale traders to align with regional standards.