Consolidation of the facts As tourism is contributing significantly over the years to the Southeast Asian countries economic development, therefore, it becomes intuitive to investigate Southeast Asian regional countries tourism industry. This investigation is important for at least two reasons. At first, for the last three decades or so, this region is experiencing remarkable regional economic cooperation among ASEAN nations. Second, tourism is considered as a tool of comprehensive thought in the regional development and strategic planning since the region possesses one of the major tourism destinations in the world. Ghimire (2001) postulated that Southeast Asian nations view tourism as an important industry in generating foreign exchange earnings, income, and employment. The facts and figures are presented in this paper confirm a number of conclusions. First, the statistics presented above illustrate the state, extent and pattern of international tourism in Southeast Asia. It also addresses the importance of tourism to the associated countries of Southeast Asia. It is clear from the scenario that Southeast Asia’s tourism is heavily driven by the augmented economic development of its associated countries. Secondly, the extent of tourism development in Southeast Asian region varies considerably among the member countries where some countries, to some extent, have achieved efficiency in tourism development and are dominating over the other late starters in the theoretical field of tourism development. A number of Southeast Asian countries (e.g. Thailand, Singapore, Malaysia and Indonesia) have been appeared as successful tourism destination where tourism products are comparatively well-established. On the other side, countries, such as The Philippines, Viet Nam, Cambodia, and Myanmar have enormous potential for developing their tourism industry although, up till now, tourism development to these countries is still at its infancy. Thirdly, the scenario illustrated above also highlights the approximate explanations of why tourism development in some countries of Southeast Asia attained substantial attention than others.