The Indian Ocean Region (IOR) is one of the most areas of the world in human terms. This study provides a comprehensive overview of the subregions and countries in the IOR, drawing heavily on a new country risk assessment model developed by Abdullah Toukan, a senior associate with the Burke Chair at CSIS. It provides detailed graphs, tables, and maps covering the IOR as a whole, each major subregion, and each of the thirty-two countries in the region as well as the impact of U.S. and Chinese military forces.