Indonesia is not an island. It is a nation spread across a number of islands. It occupies part of the Island of New Guinea. That island is about 3,000 miles long. It is between Asia and Australia.
If you take Wallace's line as the dividing point between Asia and Australia, then Borneo is Asia's largest island.
The island of Sumatra.
Sumatra is an island in Indonesia with coordinates 0°00′N, 102°00′E, right on the equator.
The largest, western most island of Indonesia is Sumatra. This is true only if one considers ownership of an entire island. However, the island of Borneo is almost twice as large, and Indonesia controls more square miles of this island - than the entire size of Sumatra - even though Indonesia shares Borneo with the countries of Malaysia, and Brunei.
The largest island in South Australia is Kangaroo Island.
Indonesia
Java
Some of the largest islands in Indonesia are Sumatra, Java, and Celebes. Sumatra is the largest of all the islands in Indonesia with an area of 164,000 square miles. Indonesia is made up of over 18,000 islands.
The capital of Bali (in Indonesia) is Denpasar. Bali is an Indonesian island westernmost of the Lesser Sunda Islands. Bali is a small island, but it is densely populated, and culturally and economically one of the most important islands of Indonesia.
Balikpapan is a city in Kalimantan ( Borneo ) Island, the largest island in Indonesia archipelago, while Bali is the name of Bali Island . Indonesia is archipelago country. Both Bali and Kalimantan are parts of Indonesia
On the Island of Java in Indonesia.If you mean Jakarta, it is in Indonesia.
Indonesia
Sumatra with 470 000 km2
sumatera and sulawesi