Great Power Competition: China and the US Influence in Southeast Asia

Southeast Asian nations are currently navigating a complex geopolitical landscape as they balance deepening economic ties with China against long-standing security partnerships with the United States. While Beijing remains the largest trading partner for most ASEAN members, Washington maintains a critical role in regional security architecture, creating a dynamic where regional states prioritize strategic autonomy over choosing a definitive side in the US-China rivalry.

How Economic and Security Interests Diverge

The strategic influence of the United States and China in Southeast Asia operates through distinct, often non-competing, channels. According to the ISEAS-Yusof Ishak Institute’s 2024 State of Southeast Asia survey, China is viewed as the most influential economic power in the region by a significant margin. Beijing’s dominance in trade and infrastructure investment—facilitated by the Belt and Road Initiative—has made it an indispensable economic partner for countries like Cambodia, Laos, and Indonesia.

Conversely, the United States remains a preferred security guarantor. The U.S. Department of State emphasizes its commitment to a “free and open Indo-Pacific,” which resonates with regional concerns regarding maritime sovereignty in the South China Sea. While China’s economic footprint is larger, the U.S. continues to hold an advantage in soft power, including educational exchanges, democratic values, and technological cooperation.

Why Regional States Avoid Alignment

Most Southeast Asian governments actively resist being forced into a binary alignment. This policy, often described as “hedging,” is designed to prevent the region from becoming a theater for proxy conflict. The 2024 Lowy Institute Asia Power Index indicates that while the United States maintains a lead in overall military capability and diplomatic networks, China’s proximity and economic integration create a “gravity effect” that prevents any total decoupling by regional states.

Leaders in the region, particularly within the ASEAN framework, frequently cite the need for “ASEAN Centrality.” This principle dictates that regional security decisions should be managed by the bloc itself rather than dictated by external powers. By maintaining open lines of communication with both Washington and Beijing, these countries aim to leverage competition to secure better trade deals and infrastructure funding.

Comparison of Regional Influence Metrics

What Happens Next in Regional Diplomacy

The trajectory of regional influence will likely depend on how each power manages its domestic economic stability and its willingness to engage with ASEAN institutions. The Council on Foreign Relations notes that U.S. influence is often hindered by the absence of a comprehensive regional trade agreement, such as the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP), from which Washington withdrew in 2017.

Meanwhile, China faces challenges related to its slowing domestic economy and ongoing maritime disputes with the Philippines, Vietnam, and Malaysia. These tensions periodically erode the trust required for deeper economic integration. For the next decade, Southeast Asia will likely continue to act as a “swing” region, where the primary objective is to maximize national development while minimizing the risks associated with being caught in the crossfire of great power competition.

Key Takeaways

• Economic Dominance: China remains the region’s dominant economic partner, though this is tempered by maritime disputes.
• Security Reliance: The U.S. maintains a structural advantage in regional security, bolstered by long-standing military partnerships.
• Strategic Autonomy: ASEAN nations prioritize neutrality to maintain their own economic development and political stability.
• Institutional Power: ASEAN Centrality remains the primary mechanism for regional states to mitigate external pressure from Washington and Beijing.