The current geopolitical dynamics of Southeast Asia are strongly influenced by various global factors. Rising tensions, especially between major powers such as the United States and China, have presented challenges and opportunities for countries in the region. Southeast Asia, with its significant economic potential and strategic position, is becoming an arena for complex hegemonic competition. The role of the US and China is very important. The US seeks to maintain its influence through its “Free and Open Indo-Pacific” policy, emphasizing the importance of international law and freedom of navigation. On the other hand, China is expanding its influence through the Belt and Road Initiative (BRI), which offers infrastructure investment and power projection that has resulted in dependency for some countries. One hot spot is the South China Sea, where territorial disputes between China and several Southeast Asian countries, such as Vietnam and the Philippines, continue to fuel tensions. China claims most of the area, while other countries fight for their rights based on international law, such as the UN Convention on the Law of the Sea (UNCLOS). These tensions often trigger military exercises and the formation of alliances, such as between the US and the Philippines, aimed at balancing power. In this context, ASEAN acts as a regional diplomacy platform. Despite facing difficulties in reaching consensus, ASEAN strives to maintain stability in the region. Through declarations and regular meetings, member countries try to strengthen cooperation on security and economic issues. Nevertheless, major challenges remain, especially related to differences in member interests and external influences. Southeast Asian economies also play a role in geopolitical dynamics. Countries such as Indonesia, Malaysia and Thailand, with stable economic growth, are increasingly being sought as strategic partners. Investment from China and the US is seen in a variety of sectors, including technology, energy and agriculture. In this regard, competition to position oneself as the most profitable partner is crucial. In the field, issues such as climate change and food security are also the focus of attention. Southeast Asian countries must navigate these challenges while maintaining regional stability and cooperation. Climate change, for example, forces these countries to adapt and innovate in development strategies. In a security context, terrorism and extremism remain a serious threat. ASEAN countries have begun to strengthen cooperation in sharing intelligence and countering terrorism. With the presence of militant groups in several countries, a collective response is critical to maintaining regional security. In addition, the development of information and communication technology has changed the way of interaction between countries. Social media and digital platforms have played a role in amplifying public opinion and shaping the national narrative. This impacts domestic politics as well as foreign relations. With all these dynamics, Southeast Asia is at a historical crossroads. Great powers, climate change, and domestic and regional challenges create a complex landscape. Countries in this region must think strategically to adapt and take advantage of existing global tensions. Success in creating effective policies will determine the future of Southeast Asia in the global geopolitical context.