Kalimantan GuideKalimantan is the Indonesian part of the island of Borneo, the 3rd largest island in the world. The Indonesian part covers some 580.000 km2, the vast area is home to only 12 million people, so most of the provinces, especially the interior is very sparsely populated, and the vast rain forests here is some of the most bio-diverse areas in the world. HotelsFind hotels in Pontianak, Banjarmasin and more. PontianakPontianak is the capital of the Indonesian province of West Kalimantan, on the island of Borneo. BanjarmasinBanjarmasin is the biggest city in South Kalimantan. The city population was 625,395 at the 2010 Census. BalikpapanBalikpapan is a city in East Kalimantan. It serves as headquarters for international oil companies, mining companies and related support industries operating in eastern Kalimantan. South KalimantanSouth Kalimantan is on the Indonesian side of the island of Borneo. By land area South Kalimantan is the smallest province in Kalimantan but the capital province is the largest city in a whole Kalimantan. East KalimantanEast Kalimantan is the easternmost and the northernmost of Kalimantan. Best known for the beautiful beaches along its east coast, it stretches from the Celebes Sea near Malaysia into the Makassar Strait. West KalimantanWest Kalimantan is a province of Indonesia in Kalimantan, the Indonesian part of Borneo. Central KalimantanCentral Kalimantan is in Kalimantan, Indonesia. You can go up the central river on a boat and visit orangutang reserves.