Namibia has made important progress in deploying digital infrastructure to advance sustainable development, with the Namibia Statistics Agency spearheading the establishment of a National Spatial Data Infrastructure (NSDI). Conceived as a framework for improving real-time data accessibility and coordination across government institutions, the NSDI was designed to strengthen evidence-based decision-making in national development planning. Yet, its potential has not been fully realized, owing to weak sectoral integration, limited performance monitoring, and slow adoption of advanced digital tools. This study responds to the lack of empirical insight into how Namibia’s NSDI supports sustainability outcomes, particularly its role in tracking progress toward the Sustainable Development Goals. Drawing on a qualitative review of institutional reports, national frameworks, and available geospatial platforms, the research examines the extent to which the NSDI enables data-driven governance in sectors such as urban planning, environmental management, water and land use, and disaster preparedness. Findings indicate that, while Namibia’s NSDI provides a solid institutional and technical base, its application to real-time monitoring and inter-sectoral data sharing remains uneven. The study concludes by recommending actionable strategies—such as integrating mobile geographic information systems, interactive dashboards, and automated reporting systems—to optimize NSDI’s effectiveness, offering lessons for countries seeking resilient, data-driven pathways to sustainability.