Indonesia has people.
Indonesia . It has an estimated population of over 260 million people and is the world 's fourth most populous country , the most populous Austronesian nation , as well as the most populous Muslim-majority country . The world 's most populous island , Java , contains more than half of the country 's population . Its capital and country 's most populous city is Jakarta , which is also the most populous city in Southeast Asia and the second in Asia . The population is unevenly spread throughout the islands within a variety of habitats and levels of development , ranging from the megalopolis of Jakarta to uncontacted tribes in the east .