The Republic of Indonesia is made up of an estimated 17,508 separate islands with around 6,000 of them inhabited. This makes Indonesia the world's largest country that is comprised of islands.
According to CIA data from 2014, the population of Indonesia is estimated to be 253 million people, making it the fourth most populous country after China, India and the United States. Approximately 87 percent of the population identifies as Muslim, making Indonesia the largest Muslim-majority nation in the world.
Java is the most populous island of Indonesia as well as in the world. Its 2014 estimated population is 143 million, which is around 57 percent of the Indonesian population. The capital city of Jakarta is located in western Java.