The geopolitics of Southeast Asia are currently increasingly attracting world attention, especially due to shifts in power and influence in the region. In recent years, countries such as China, the US and ASEAN countries have been faced with various challenges and opportunities that can affect regional stability. One of the dominant factors in power dynamics in Southeast Asia is the existence of the South China Sea. This region is rich in natural resources and strategic trade routes. China, through its nine-dash line policy, is trying to claim most of the region, which has raised tensions with neighboring countries, such as Vietnam, the Philippines and Malaysia. Despite diplomatic efforts, tensions still frequently arise, creating a greater risk of conflict. Meanwhile, the United States is seeking to strengthen its position in the region through various initiatives, including the Free and Open Indo-Pacific Strategy. The US is investing in security partnerships with ASEAN countries to counter Chinese influence. Military training and joint exercises are increasingly being carried out to improve regional defense capabilities. ASEAN’s existence as a regional organization also plays an important role in mitigating tensions. With the principles of non-intervention and dialogue, ASEAN strives to be a platform for resolving disputes. Despite challenges in reaching agreement, cooperation on issues such as climate change and maritime security took center stage. Domestic dynamics in each country also greatly influence geopolitics. For example, domestic politics in Myanmar and the internal situation in Thailand and the Philippines influence their foreign policy. The political crisis in Myanmar after the military coup has changed the interactions of surrounding countries by resulting in sanctions and exclusion. Infrastructure development is also a key aspect in Southeast Asian geopolitics. The Belt and Road Initiative (BRI) project initiated by China allows ASEAN countries to gain investment, but also creates economic dependence. Countries such as Indonesia and Malaysia must be careful in managing loans so as not to get trapped in debt. Competition in technology is also intensifying. Countries in Southeast Asia are trying to attract investment in the information and communications technology (ICT) sector. The digital economy in the region is growing rapidly, with the rise of e-commerce and fintech as key drivers of growth. This provides an opportunity for countries to compete in innovation and development. Social issues, such as human rights and inequality also affect stability in the region. Anti-corruption and pro-democracy activism is increasing, with the younger generation daring to voice their aspirations. This adds a layer of complexity to relations between countries in Southeast Asia. Regional rivalries between major powers, disagreements within ASEAN, and domestic and social challenges will continue to shape Southeast Asia’s geopolitical landscape. Thus, the influence of large countries such as China and the United States, as well as the active role of ASEAN, will be key in determining the future of this region. Despite the challenges faced, Southeast Asia remains at the center of global attention, with dynamics that continue to develop over time.