This study examines the impact of open banking on digital financial inclusion (DFI) across 82 countries, addressing a gap in empirical evidence on its effectiveness. Open banking, which allows third-party providers to access consumer banking data via secure APIs, is often promoted as a means to enhance financial inclusion by fostering competition and innovation. However, the study's findings reveal that the impact of open banking on financial inclusion is highly context-dependent. In advanced economies, there is some evidence of modest improvements in DFI following open banking adoption. Conversely, in emerging markets, the results are mixed, with some countries showing no significant benefits and others, like Iran, even experiencing negative impacts. This variation highlights the importance of local financial ecosystems, digital infrastructure, and regulatory support in determining the success of open banking initiatives. The study concludes that while open banking has potential, its effectiveness in enhancing financial inclusion is not guaranteed and is heavily influenced by the broader economic and regulatory context. Further research is needed to explore alternative measures and the long-term effects of open banking on financial inclusion.