The geopolitical dynamics of Southeast Asia after the COVID-19 pandemic have experienced significant changes influenced by various factors, ranging from US-China tensions to regional economic revival. In this context, ASEAN (Association of Southeast Asian Nations) plays a key role in facilitating cooperation and coordination between countries. Tensions between the US and China have intensified in the wake of the pandemic. China is expanding its influence through the Belt and Road initiative, while the US is seeking to strengthen strategic alliances in the region. Southeast Asian countries have become a field of competition for these two great powers, with countries such as Vietnam and the Philippines trying to balance their relations with both parties. Southeast Asian economies are witnessing rapid recovery despite the pandemic. Sectors such as information technology and digital marketing are growing rapidly, driven by changes in consumer behavior. Countries such as Indonesia and Malaysia have recorded growth in the e-commerce sector, which is the main driver of post-pandemic economic recovery. ASEAN also faces serious challenges in terms of public health. Mass vaccination efforts and cooperation in vaccine production are top priorities. Member countries join hands in purchasing and distributing vaccines, creating a new framework for future health collaboration. Maritime security issues remain a concern, especially in the South China Sea. Overlapping territorial claims between China and several ASEAN countries continue to raise tensions. Countries such as Malaysia and Indonesia are strengthening their navies to protect national interests and strengthening cooperation with the US in order to maintain regional stability. The climate crisis is also an important part of the geopolitical dynamics of Southeast Asia. Climate change adds risks to food and water security, with vulnerable countries such as the Philippines and Thailand facing repeated natural disasters. Cooperation between countries in mitigating the impacts of climate change has become a new focus in regional diplomacy. ASEAN’s role as a mediator in various conflicts in the region is increasingly important. The summit held virtually during the pandemic demonstrated the organization’s adaptation to new challenges. Digital diplomacy is an effective tool for maintaining communication between countries, strengthening cooperation on strategic issues. Community movement is also a concern, with increased mobility following pandemic restrictions. Migrant workers from Myanmar, Cambodia and Laos are returning to seek opportunities in neighboring countries, while human rights issues related to migration are increasingly emerging. Countries must find solutions to protect migrant workers while safeguarding their domestic interests. Finally, internal political changes in Southeast Asian countries also influence regional dynamics. The political upheaval in post-coup Myanmar and the rise of the pro-democracy movement have complicated bilateral relations. On the other hand, political stability in countries such as Thailand and Singapore strengthens their position in diplomatic negotiations and regional cooperation. The geopolitical dynamics of Southeast Asia after the pandemic are a reflection of the complex interaction between global forces and local challenges. This development requires countries to be adaptive and collaborative in dealing with interrelated issues in the post-pandemic era.