Indonesia is a country in Southeast Asia and Oceania. Indonesia comprises 17,508 islands, and with an estimated population of around 237 million people. Is the world's fourth most populous country, and has the largest Muslim population in the world. Indonesia is a republic, with an elected legislature and president. Jakarta is the capital. This country shares land borders with Guinea, Papua, Malaysia and recent East Timor. Neighboring countries: Australia, Singapore, Philippines, and Indian islands.