Southeast Asia and Oceania comprises Vietnam, Laos, Cambodia, Thailand, Myanmar (Burma), Malaysia, Indonesia, Singapore, Philippines, East Timor, Papua New Guinea, Brunei, Australia, New Zealand, and a number of small island states in the South Pacific Ocean.

The Association of Southeast Asian Nations (ASEAN) is a leading player here, and as part of expansive geopolitical strategy, both China and the United States work closely with partners in the region.