Samarinda is the largest city on Borneo (in Indonesia) with a population of 726, 223. The Indian Ocean is the third largest of the world's oceans with an area of about 27,240,000 square miles. Halmahera, Indonesia - (6,965 sq miles) (18,040 sq km) Source: UNEP island database. Between the Indian and Pacific Oceans, and directly over the Equator, is the nation of Indonesia. The largest two islands, Halmahera and Seram are sparsely populated, while the most developed, Ambon and Ternate are small. The Indian Ocean borders Australia on the east, Africa on the west, Asia on the north, and Antarctica on the south. The climate is hot and tropical, the rainforest with great landscapes place for thousands of species of flora and fauna. The territory of Indonesia stretches over 1,000 miles from north to south and over more than 3,100 miles from east to west, making it the largest archipelago in the world. The islands of Indonesia, also known as the Indonesian Archipelago, may refer either to the islands comprising the nation-state of Indonesia or to the geographical groups which include its islands. Sq miles. 309,000 Manitoulin, Lake Huron - (1,068 sq miles) (2,766 sq km) Vozrozhdeniya, Aral Sea - (888 sq miles) (2,300 sq km) Rene-Lavasseur, Manicouagan Reservoir, Quebec, Canada - … Island. New Guinea, Papua New Guinea - Indonesia. There are an estimated 1027 islands. The island is located entirely in Indonesia and sixth largest in the world, and Medan is the largest city, Kerinci is the highest point. The majority of the islands are forested and mountainous. 2), not including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago. The island actually houses three countries, part of Indonesia (about 3 quarters of the island), Malaysia (1 quarter) and Brunei occupying 0nly about 1%. This is a list of the most populous islands in Indonesia, sorted from the highest to lowest.This list also includes the respective islands' population density as well as their most populous settlements (all of its population statistics are taken from 2014 data, unless noted as otherwise) and comparisons with other countries and territories. The world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Archipelago. LARGEST LAKE ISLANDS. Within Indonesia, only Sumatra, Borneo and Papua are larger in territory, and only Java and Sumatra have larger populations. Some of its islands share terrestrial borders with other countries including East Timor, Malaysia, and Papua New Guinea. The most well known islands like Java, Sumatra and Borneo are among the biggest in the world, but the smaller ones are also well worth a … It accounts for 20% of the earth's surface water. The Maluku Islands have a total area of 850,000 km 2, 90% of which is sea. Sq km . Area. Sumatra is one of the Sunda Islands of western Indonesia.It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km 2 (182,812 mi. The country is home to a staggering 18,000 different islands. Large islands shared by Indonesia and other countries. The islands of the Indian Ocean are not as large as those of the Pacific, but they are equally popular.