This study examines the impact of exports, imports, and trade openness on Namibia’s economic growth using the ARDL cointegration method. The results reveal a significant negative relationship between imports and economic growth, while exports and trade openness show positive and significant relationships with economic growth. Moreover, short-term economic growth is driven by exports, imports, and trade openness. The findings suggest that trade liberalisation and export-led growth are crucial for Namibia’s economic development. Overall, this study supports the mercantilist theory, which emphasises the importance of participating in global markets by increasing exports and trade.