Borneo is the
third largest island in the world and is located at the centre of
Maritime Southeast Asia. Administratively, this island is divided among
Indonesia (
Kalimantan, population 12,000,000),
Malaysia (
Sarawak and
Sabah, pop. 6,000,000) and
Brunei (pop. 590,000). Indonesians refer to the island as
Kalimantan. However, for people outside of Indonesia, Kalimantan refers to the Indonesian part of the island of Borneo. Malaysia's region of Borneo is collectively called
East Malaysia or
Malaysian Borneo. Malaysians usually refer to the island by the names of either of its two Malaysian provinces,
Sarawak and
Sabah. The independent nation of
Brunei occupies the remainder of the island.
Geography
Borneo is surrounded by the
South China Sea to the north and northwest, the
Sulu Sea to the northeast, the
Celebes Sea and the
Makassar Strait to the east and the
Java Sea and
Karimata Strait to the south. It has an area of .
To the west of Borneo are the
Malay Peninsula and
Sumatra. To the south is
Java. To the east is the island of
Sulawesi (Celebes). To the northeast is the
Philippines.
Borneo's highest point is
Mount Kinabalu in
Sabah,
Malaysia, with an elevation of above
sea level. This makes it the world's
third highest island.
The largest river systems are the
Kapuas River, with approximately the longest river in Indonesia, the
Rajang River in Sarawak with some the longest river in Malaysia, the
Barito River about long and the
Mahakam River about long.
Borneo is also known for its extensive cave systems. Clearwater Cave has one of the world's longest underground rivers.
Deer Cave, thought to be the largest cave passage in the world, is home to over three million
bats and
guano accumulated to over high.
Largest cities
The following is a list of urban areas in Borneo by population based on 2008 calculations compiled by
The World Gazetteer.
Administration

Political divisions of Borneo
The island of Borneo is divided administratively into 3 parts, the only island in the world that is a recognised part of 3 countries:
- The independent country of Brunei (main part and eastern exclave of Temburong)
1) Brunei: Census of Population 2001
2) strictly speaking not on Borneo, but on nearshore islands (2.5 km off the main island of Borneo)
3) largest city
History
According to ancient Chinese, Indian and Javanese manuscripts, western coastal cities of Borneo had become trading ports, part of their trade routes, since the first millennium.
In Chinese manuscripts,
gold,
camphor,
tortoise shells,
hornbill ivory,
rhinoceros horn,
crane crest,
beeswax, lakawood (a scented heartwood and root wood of a thick
liana,
Dalbergia parviflora),
dragon's blood,
rattan, edible
bird's nests and various spices were among the most valuable items from Borneo.
The
Indians named Borneo as
Suvarnabhumi (the land of gold) and also
Karpuradvipa (the Camphor Island), which includes the western part of the island shared with
Sumatra island. The
Javanese named Borneo as
Puradvipa, or the Diamond Island.
Archaeological findings in the delta river of
Sarawak reveal that the area was once a thriving trading centre between India and China from the
6th century until about 1300 AD.
One of the earliest evidence of Hindu influence in
Southeast Asia were stone pillars which bears inscriptions in the
Pallava script found in
Kutai along the
Mahakam River in
East Kalimantan dated around the second half of the 4th century CE.

Dayaks, the natives of Borneo in their traditional war dress.
Headhunting was an important part of Dayak culture.
In the fourteenth century, almost all coastal part of Borneo were under the control of
Majapahit kingdom as is written in Javanese
Nagarakretagama document (circa 1365 AD) and it was called
Nusa Tanjungnagara. The name of a trading port city in Borneo is
Tanjungpura in Nagarakretagama; the same name written in another Javanese
Pararaton document (circa 1355 AD).
In the
15th century, the
Majapahit rule exerted its influence in Borneo. Princess Junjung Buih, the queen of the Hindu kingdom of Negara Dipa (situated in Candi Agung area of Amuntai) married a Javanese prince, Prince Suryanata, and together they ruled the kingdom which is a tributary to the Majapahit Empire (1365). In this way, it became a part of
Nusantara. Along the way, the power of Negara Dipa weakened and was replaced by the new court of Negara Daha. When Prince Samudra (Prince Suriansyah) of Negara Daha converted to Islam and formed the Islamic kingdom of Banjar, it inherited some of the areas previously ruled by the Hindu kingdom of Negara Daha.
The
Brunei Sultanate during its golden age from the
15th to
17th centuries ruled a large part of northern Borneo. In 1703 (other sources say 1658), the
Sultanate of Sulu received North Borneo from the Sultan of Brunei, after Sulu sent aid against a rebellion in Brunei. During the 1450s, Shari'ful Hashem Syed Abu Bakr, an Arab born in Johor, arrived in Sulu from Malacca. In 1457, he founded the Sultanate of Sulu; he then renamed himself "Paduka Maulana Mahasari Sharif Sultan Hashem Abu Bakr". Subsequently HM Sultan Jamalul Ahlam Kiram (1863-1881) the 29th reigning Sultan of Sulu leased North Borneo in 1878 to Gustavus Baron de Overbeck & Alfred Dent representing the
British North Borneo Company in what is now
Sabah part of Malaysia. The company also exerted control on inland territories that were inhabited by numerous tribes. In the
19th century coastal areas ruled by the
Brunei Sultanate in the west of the island were gradually taken by the
Brooke dynasty. The Brooke dynasty ruled
Sarawak for a hundred years and became famous as the "
White Rajahs".
By the
18th century, the area from
Sambas to
Berau were tributaries to the Banjar Kingdom, but this eventually shrunk to the size of what is now
South Kalimantan as a result of agreements with the
Dutch. In the Karang Intan Agreement during the reign of Prince Nata Dilaga (Susuhunan Nata Alam) (1808-1825), the Banjar Kingdom gave up its territories to the Dutch Indies which included Bulungan,
Kutai, Pasir, Pagatan and Kotawaringin. Other territories given up to the Dutch Indies were Landak, Sambas, Sintang and Sukadana.
In the early-
19th century,
British and Dutch governments signed the
Anglo-Dutch Treaty of 1824 to exchange trading ports under their controls and assert spheres of influences, in which indirectly set apart the two parts of Borneo into British and Dutch controlled areas.
China has had historical trading links with the inhabitants of the island. Some of the Chinese beads and wares found their way deep into the interior of Borneo. The
Malay and
Sea Dayak pirates preyed on maritime shipping in the waters between Singapore and Hong Kong from their haven in Borneo. In 1849
James Brooke and his Malays attacked the Sea-Dayaks and wiped out 800 of the 4,000 pirates.
Moreover in the
19th century, the Dutch admitted the founding of district kingdoms with native leaders who were under the power of the Dutch (
Indirect Bestuur).
The Dutch assign a resident to head their rule over Kalimantan. List of the residents and governors of Kalimantan:
- C.A. Kroesen (1898), resident
- C.J. Van Kempen (1924), resident
- J. De Haan (1924-1929), resident
- R. Koppenel (1929-1931), resident
- W.G. Morggeustrom (1933-1937), resident
- Dr. A. Haga (1938-1942), governor
- Pangeran Musa Ardi Kesuma (1942-1945), Ridzie
- Ir. Pangeran Muhammad Noor (1945), governor
Since 1938, Dutch-Borneo (Kalimantan) was one administrative territory under a governor (Governor Haga) whose seat was in
Banjarmasin. In 1957 following the independence of Indonesia, Kalimantan was divided into 3 provinces which is South Kalimantan, East Kalimantan and West Kalimantan. The province of Central Kalimantan separated from South Kalimantan to have their own territory in 1958.
During the
Second World War, Japanese forces gained control of Borneo (1941–45). They decimated many local populations and Malay intellectuals, including the elimination of the Malay Sultanate of
Sambas in
Kalimantan. During the Japanese occupation the Dayaks played a role in guerilla warfare against the occupying forces, particularly in the Kapit Division where
headhunting was temporarily revived towards the end of the war. Borneo was the main site of the
confrontation between
Indonesia and
Malaysia between 1962 and 1966, as well as the
communist revolts to gain control of the whole area. Before the formation of Malaysian Federation, the
Philippines claimed that the Malaysian state of
Sabah in
north Borneo is within their territorial rights based on historical facts of the Sultanate of Sulu's leasing agreement with the North Borneo Company, is presently an unresolved claim against Malaysia. Several other territorial claims such as
Sipadan were resolved at
The Hague international courts.
Ecology
Borneo is very rich in
biodiversity compared to many other areas (MacKinnon et al. 1998). There are about 15,000 species of
flowering plants with 3,000 species of trees (267 species are
dipterocarps), 221 species of terrestrial mammals and 420 species of resident birds in Borneo (MacKinnon et al. 1998). It is also the centre of evolution and radiation of many endemic species of plants and animals. The remaining Borneo
rainforest is the only
natural habitat for the endangered
Bornean Orangutan. It is also an important refuge for many
endemic forest species, as the
Asian Elephant, the
Sumatran Rhinoceros, the
Bornean Clouded Leopard, and the
Dayak Fruit Bat.
It is one of the most biodiverse places on earth. The
World Wildlife Fund has stated that 361 animal and plant species have been discovered in Borneo since 1996, underscoring its unparalleled biodiversity. In the 18 month period from July 2005 until December 2006, another 52 new species were found.

Satellite image of the island of Borneo on August 19, 2002, showing smoke from burning peat swamp forests.
The
World Wildlife Fund divides the island into seven distinct
ecoregions. The
Borneo lowland rain forests cover most of the island, with an area of . Other lowland ecoregions are the
Borneo peat swamp forests, the
Kerangas or Sundaland heath forests, the
Southwest Borneo freshwater swamp forests, and the
Sunda Shelf mangroves. The Borneo mountain rain forests lie in the central highlands of the island, above the elevation. The highest elevations of
Mount Kinabalu are home to the Kinabalu mountain
alpine meadow, an alpine shrubland notable for its numerous endemic species, including many orchids.
The island historically had extensive
rainforest cover, but the area shrank rapidly due to heavy
logging for the needs of the Malaysian plywood industry. Two researchers of , Sandakan, Sabah in the early '80s identified four fast-growing hardwoods and a breakthrough on seed collection and handling of
Acacia mangium and
Gmelina arborea, a fast growing tropical trees were planted on huge tract of formerly logged and deforested areas primarily in the northern part of Borneo Island. Half of the annual global
tropical timber acquisition comes from Borneo. Furthermore,
Palm oil plantations are rapidly encroaching on the last remnants of primary rainforest. The rainforest was also greatly destroyed from the forest fires of 1997 to 1998, which were started by the locals to clear the forests for crops and perpetuated by an exceptionally dry
El Niño season during that period. During the great fire, hotspots could be seen on
satellite images and the
haze thus created affected the surrounding countries of
Brunei,
Malaysia,
Indonesia and
Singapore. In February 2008, the Malaysian government announced the
Sarawak Corridor of Renewable Energy plan
to harvest the virgin hinterlands of Northern Borneo. Further deforestation and destruction of the biodiversity are anticipated in the wake of logging commissions, hydroelectric dams and other mining of minerals and resources.
In order to combat overpopulation and AIDS in
Java, the Indonesian government started a massive transmigration (
transmigrasi) of poor farmers and landless peasants into Borneo in the 70's and 80's, to farm the logged areas, albeit with little success as the fertility of the land has been removed with the trees and what soil remains is washed away in tropical downpours.
Demographics
Borneo has 15,721,384 inhabitants (January 2005) and thus a population density of 16 inhabitants per km. The population lives mainly on the coast, furthermore in the cities. The hinterland is occupied at most in small towns and villages along the rivers. The population consists mainly of
Malays,
Chinese and
Dayak ethnic groups. The
Chinese, who make up 29% of the population of
Sarawak and 17% of total population in
West Kalimantan, originally migrated from southeastern China. The majority of the population in Kalimantan is either
Muslim or practice animism. Approximately 15% of the Dayak are Christian, a religion introduced by missionaries in the 19th Century. In the interior of Borneo are also the
Penan, some of who still practice a nomadic
hunter-gatherer existence. In some coastal areas of marginal settlements are also found
Bajau, who were historically associated with a sea-oriented, boat-dwelling, nomadic existence. In the northwest of Borneo, the Dayak ethnic group is represented by the
Iban with about 710,000 members.
There are over 30 Dayak sub-
ethnic groups living in Borneo, making the population of this island one of the most varied of human
social groups. Some sub-ethnicities are now represented by only 30-100 individuals and are threatened with extinction. Ancestral knowledge of
ethnobotany and
ethnozoology is useful in drug discovery (for example,
bintangor plant for
AIDS) or as future alternative food sources (such as
sago starch for
lactic acid production and sago maggots as a protein source). Certain indigenous Dayak people (such as the
Kayan,
Kenyah,
Punan Bah and
Penan) living on the island have been struggling for decades for their right to preserve their environment from loggers and transmigrant settlers and colonists.
Kalimantan was the focus for an intense
transmigration program that financed the relocation of poor landless families from Java, Madura, and Bali. In 2000, transmigrants made up 21% of the population in
Central Kalimantan. Since the 1990s,
violent conflict has occurred between some transmigrant and indigenous populations; in Kalimantan, thousands were killed in fighting between
Madurese transmigrants and the indigenous Dayak people.
See also