West Papua (), formerly Irian Jaya Barat (West Irian), is an Indonesian province located in Indonesia Papua. It covers most of the two western peninsulas of the island of New Guinea: the eastern half of the Bird's Head Peninsula (or Doberai Peninsula) and the whole of the Bomberai Peninsula, along with nearby smaller islands. The province is bordered to the north by the Pacific Ocean; to the west by Southwest Papua Province, the Halmahera Sea and the Ceram Sea; to the south by the Banda Sea; and to the east by the province of Central Papua and the Cenderawasih Bay. Manokwari is the province's capital and largest city. With an estimated population of 587,645 in mid-2025 (comprising 308,424 males and 279,221 females), West Papua is the second-least-populous province in Indonesia after South Papua, following the separation off in December 2022 of the western half of the Bird's Head Peninsula to create the new province of Southwest Papua, containing 52% of what had been West Papua's population.Badan Pusat Statistik, Jakarta, 27 February 2026, Provinsi Papua Barat Dalam Angka 2026 (Katalog-BPS 1102001.91) Its population density is similar to that of Russia.
After the Japanese surrender in 1945, the Dutch remained in New Guinea until 1962 when they transferred the control of the region to the Indonesian government as a part of the New York Agreement. West Papua was legally created as a province in 1999 (out of the original Papua Province), but it was not inaugurated until 2003. Consisting until 2022 of twelve regencies and one city, the province has a special autonomous status as granted by Indonesian legislation.
West Papua has a medium Human Development Index. The Indonesian government has launched the building of ambitious infrastructure projects including the Trans-Papua Highway, airports, and other facilities. Detractors claim that these projects threaten Southeast Asia's and Oceania's last large regions of tropical rainforests and native cultures. According to Bank Indonesia, West Papua recorded an economic growth rate of 7.7% during 2018, which is higher than the national economic growth.
History Etymology There are several theories regarding the origin of the word Papua. One theory is that the name comes from the word 'Papo-Ua', named by the Tidore Sultanate, which in the Tidore language means "not joining" or "not being united", meaning that the island had no king. Before the age of colonization, the Tidore Sultanate controlled some parts of the Bird's Head Peninsula in what is now the province of Southwest Papua before expanding to also include coastal regions in the current province of Papua. This relationship played an important historical role in binding Indonesia to the Papua.Trajectories of the early-modern kingdoms in eastern Indonesia Another theory is that the word Papua comes from the Malay word 'papuwah', which means 'frizzled hair'. It was first mentioned in 1812 Malay Dictionary by William Marsden, although it was not found on earlier dictionaries. In the records of 16th century Portuguese and Spanish sailors, the word 'Papua' is the designation for the inhabitants who inhabit the Raja Ampat Islands and the coastal parts of the Bird's Head Peninsula.
The former name of the province, Irian Jaya, was suggested during a tribal committee meeting in Tobati, Jayapura, formed by Atmoprasojo, head of bestuur school in the 1940s, Frans Kaisiepo the committee leader suggested name from Mansren Koreri myths, Iri-an from the Biak language of Biak Island, meaning "hot land" referring to local hot climate, but also from Iryan which means heated process as a metaphor for a land that is entering new era. In Serui Iri-an () means "pillar of nation", while in Merauke Iri-an () means "rising spirit" or "to rise". The name was promoted in 1945 by Marcus Kaisiepo, brother of the future governor Frans Kaisiepo. The name Irian was politicized later by Marthin Indey and Silas Papare with the Indonesian acronym 'Ikut Republik Indonesia Anti Nederland' (Join the Republic of Indonesia oppose the Netherlands). The name was used throughout the Suharto administration, until it was changed to Papua during the administration of President Abdurrahman Wahid.
The Dutch, who arrived later under Jacob Le Maire and Willem Schouten, called it Schouten island. They later used this name only to refer to islands off the north coast of Papua proper, the Schouten Islands or Biak Island. When the Dutch colonized this island as part of the Dutch East Indies, they called it Nieuw Guinea.
Speakers align themselves with a political orientation when choosing a name for the western half of the island of New Guinea. The official name of the region is "Papua" according to International Organization for Standardization (ISO). Independence activists refer to the region as "West Papua", while Indonesian officials have also used "West Papua" to name the westernmost province of the region since 2007. Historically, the region has had the official names of Netherlands New Guinea (1895–1962), West Irian or Irian Barat (1962–73), Irian Jaya (1973–2002), Irian Jaya Barat (2003–2007), and Papua Barat (2007–present).
Pre-colonial era
Papuan habitation of the region is estimated to have begun over 50,000 years ago.Gaffney, D., Tanudirjo, D.A., Djami, E.N.I., Mas' Ud, Z., Macap, A.R., Russell, T., Dailom, M., Ray, Y., Higham, T., Bradshaw, F., Petchey, F., et al. 2024. Human dispersal and plant processing in the Pacific 55 000–50 000 years ago. Antiquity, 98(400), pp.885–904. doi:10.15184/aqy.2024.83 Research indicates that the highlands were an early and independent centre of agriculture, and show that agriculture developed gradually over several thousands of years; the banana has been cultivated in this region for at least 7,000 years. Austronesian peoples migrating through Maritime Southeast Asia settled in the area at least 3,000 years ago, and populated especially in Cenderawasih Bay. Diverse cultures and languages have developed in the island due to geographical isolation; there are over 300 languages and two hundred additional dialects in the region (see Papuan languages, Austronesian languages, Central–Eastern Malayo-Polynesian languages).
Chinese referred to it as Tungki, the area where they obtained spices. Meanwhile, in the latter half of 600 AD, the Sumatra-based empire of Srivijaya (7th century–13th century) referred to the island as Janggi. The empire engaged in trade relations with western New Guinea, initially taking items like sandalwood and birds-of-paradise in tribute to China, but later making slaves out of the natives. It was only at the beginning of 700 AD that traders from Persia and Gujarat began to arrive in what is now Papua and call it Dwi Panta or Samudrananta, which means 'at edge of the ocean'.
The 14th-century Majapahit poem Nagarakretagama mentioned Wwanin or Onin and Sran as a recognized territory in the east, today identified as Onin peninsula in Fakfak Regency in the western part of the larger Bomberai Peninsula south of the Bird's Head region of Western New Guinea. At that time, Papua was said to be the eighth region of the Majapahit Empire. Wanin or Onin was probably the oldest name in recorded history to refer to the western part of the island of New Guinea. A transcript from the Nagarakretagama says the following:
Ikang sakasanusasanusa Makasar Butun Banggawai Kuni Ggaliyao mwang i [ng] Salaya Sumba Solot Muar muwah tigang i Wandan Ambwan Athawa maloko Ewanin ri Sran ini Timur ning angeka nusatutur.
According to some linguists, the word Ewanin is another name for Onin, while Sran popularly misunderstood to refers to Seram Island in Maluku, is more likely another name for Kowiai. The local Papuan kingdom in its native language is called Sran Eman Muun which is based in Kaimana and its furthest influence extends to the Kei Islands, in southeastern Maluku. In his book Nieuw Guinea, Dutch author WC. Klein explained the beginning of the influence of the Bacan Sultanate in Papua. There he wrote: In 1569 Papoese hoof den bezoeken Batjan. Ee aanterijken worden vermeld (In 1569, Papuan tribal leaders visited Bacan, which resulted in the creation of new kingdoms). According to the oral history of the Biak people, there used to be a relationship and marriage between their tribal chiefs and the sultans of Tidore. The Biak people is the largest Melanesian tribe that spreads on the northern coast of Papua, therefore the Biak language is also the most widely used and considered the language of Papuan unity. Due to the relationship of the coastal areas of Papua with the Sultans of Maluku, there are several local kingdoms on this island, which shows the entry of the system of feudalism that does not originated from Papua itself.
Since the 16th century, apart from the Raja Ampat Islands which was contested between the Bacan Sultanate, Tidore Sultanate, and Ternate Sultanate, other coastal areas of Papua from the island of Biak to Mimika have become a vassal of the Tidore Sultanate. The Tidore Sultanate adheres to the trade pact and custom of Uli-Siwa ( federation of nine ), so there were nine trade partners led by Tidore in opposition to Ternate-led Uli Lima ( federation of five ). In administering its regions in Papua, Tidore divide them to three regions, Korano Ngaruha ( ) or Raja Ampat Islands, Papoua Gam Sio ( ) and Mafor Soa Raha ( ). The role of these kingdoms began to decline due to the entry of traders from Europe to the archipelago which marks the beginning of colonialism in the Indonesian Archipelago. During Tidore's rule, the main exports of the island during this period were resins, spices, slaves and the highly priced feathers of the bird-of-paradise. Sultan Nuku, one of the most famous Tidore sultans who rebelled against Dutch colonization, called himself "Sultan of Tidore and Papua", during his revolt in 1780s. He commanded loyalty from both Moluccan and Papuan chiefs, especially those of Raja Ampat Islands. Following Tidore's defeat, much of the territory it claimed in western part of New Guinea came under Dutch rule as part of Dutch East Indies.
Colonial era In 1511, Antonio d'Arbau, a Portuguese sailor, called the Papua region as "Os Papuas" or Ilha de Papo. Don Jorge de Menetes, a sailor from Spain also stopped by in Papua a few years later (1526–1527), he refers to the region as 'Papua', which was mentioned in the diary of Antonio Pigafetta, the clerk for the Magellan voyage. The name Papua was known to Pigafetta when he stopped on the island of Tidore. online