All eleven states of Southeast Asia are members of the Association of Southeast Asian Nations (ASEAN). Out of the 195 countries across the globe, around 50 nations are located in the Asia Pacific region. Out of these Asian countries, eleven nations are in Southeast Asia and each bears an impressive diversity in history, culture, and religion. Based on an article on NIU, here is a list of the countries in Southest Asia. Southeast Asia comprises 11 countries, with Cambodia, Vietnam, Thailand, Myanmar, Laos predominantly on the continent, Brunei, Indonesia, the Philippines, Singapore, and East Timor, exclusively on islands, while the territory of Malaysia is divided into commensurate continental and island parts. The region of Southeast Asia includes 11 countries. These countries differ in population size, cultural identity, and global influence, but all play a role in shaping the regional identity.