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United States Indo-Pacific Command (USINDOPACOM) is one of six geographic combatant commands defined by the Department of Defense's Unified Command Plan (UCP). As a geographic combatant command, USINDOPACOM is in charge of using and integrating United States Army, Navy, Air Force and Marine Corps forces within the USINDOPACOM area of responsibility (AOR) to achieve U.S. national security objectives while protecting national interests. The USINDOPACOM AOR covers more of the globe of any of the other geographic combatant commands and shares borders with all of the other five geographic combatant commands. The commander of US Indo-Pacific Command reports to the President of the United States through the Secretary of Defense and is supported by multiple component and sub-unified commands including: U.S. Forces Korea, US Forces Japan, U.S. Special Operations Command Pacific, U.S. Pacific Fleet, U.S. Marine Forces Pacific, U.S. Pacific Air Forces and U.S. Army Pacific.

There are few regions as culturally, socially, economically, and geopolitically diverse as the Asia-Pacific. The 38 nations comprising the Asia-Pacific region are home to 60% of the world's population, 3,000 different languages, several of the world's largest militaries, and five nations allied with the U.S. through mutual defense treaties. Two of the three largest economies are located in the Asia-Pacific, along with ten of the fourteen smallest. The AOR includes the most populous nation in the world, the largest democracy, and the largest Muslim-majority nation. More than one third of Asia-Pacific nations are smaller, island nations, including the smallest republic in the world and the smallest nation in Asia.

The region is a vital driver of the global economy and includes the world's busiest international sea lanes and nine of the ten largest ports. The Asia-Pacific is also a heavily militarized region, with seven of the world's ten largest standing militaries and five of the world's declared nuclear nations. Given these conditions, the strategic complexity facing the region is unique.

In concert with other U.S. government agencies, USINDOPACOM protects and defends the territory of the United States, its people, and its interests. With allies and partners, USINDOPACOM is committed to enhancing stability in the Asia-Pacific region by promoting security cooperation, encouraging peaceful development, responding to contingencies, deterring aggression, and, when necessary, fighting to win. This approach is based on partnership, presence, and military readiness.

(Last updated: August 2024)