Indonesia is the world's largest island nation, with over 17, 000 islands and a population of over 260 million people. It is located in Southeast Asia, between the Indian and Pacific Oceans, and is the world's fourth most populous country. Indonesia is home to hundreds of ethnic groups, including Javanese, Sundanese, and Balinese, and is the world's most populous Muslim-majority country. It is also the world's 16th largest economy by nominal GDP.