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West Kalimantan

Province in Kalimantan, Indonesia

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West Kalimantan is nicknamed "The Province of a Thousand Rivers". The nickname references the geography of the province, which features hundreds of rivers of varying size, most of which are navigable. Several major rivers are still the main route for freight to the hinterland, despite road infrastructure now reaching most districts.

Although a small part of West Kalimantan region is seawater, West Kalimantan has dozens of large and small islands (mostly uninhabited) spread along the Karimata Strait and Natuna Sea that borders the province of Riau Islands. The total population in the province, according to the 2010 census totalled 4,395,983 inhabitants and at the 2020 Census it was 5,414,390, but by mid 2025 it was officially estimated to have reached 5,766,030.

History

The history of West Kalimantan was dominated with Hindu and Buddhist kingdoms ruling over the region and Borneo as a whole after that this kingdoms converted into muslim sultanate.

Its modern history in 17th century. The Malays are the native Muslims of West Kalimantan and established their Sultanates of Sambas since 1609 in Sambas territory, along with Mempawah Sultanate established since 1740 ruled in between Pontianak and Sambas territory. The Mempawah Sultanate brought in workers from China at the beginning of the kingdom. The same policy followed by the Sambas Sultanate around 1750, which brought in workers from China to work in the gold mines in the area.

The high Chinese population in this province was due to a republic founded by Chinese miners called the Lanfang Republic (蘭芳共和國: Republik Lanfang), an autonomous state allied with Pontianak and Sambas Sultanate, as a sub-state of the Qing. The government of Lanfang was ended in West Kalimantan after the Dutch Invasion in 1884.

West Kalimantan was under Japanese occupation from 1942 to 1945, when Indonesia declared its Independence. During the Japanese occupation, more than 21,000 people in Pontianak (including sultans, men, women and children) were kidnapped, tortured and massacred by Japanese troops during the Pontianak incidents. All the Malay Sultans on Kalimantan were executed and the Malay elite was devastated by the Japanese. Most of the victims were buried in several giant wells in Mandor (88 km from Pontianak). After the end of the war, Japanese officers in Pontianak were arrested by allied troops and brought in the International Military Tribunal for the Far East.

A monument called Makam Juang Mandor was created to memorialize the event.

On 12 May 1947, the West Kalimantan Autonomous region was established. It was led by Syarif Hamid II of Pontianak, who supported the Dutch endeavour to establish a federal United States of Indonesia (RUSI), of which West Kalimantan would have been a component. Following the 5 April 1950 arrest of Sultan Hamid for complicity in the APRA coup attempt against the RUSI government led by Royal Netherlands East Indies Army (KNIL) officer Raymond Westerling, there were demands from the public for a merger into the Republic of Indonesia, which took place on 22 April. On 15 August, The West Kalimantan autonomous region became part of Kalimantan Province, and two days later, the RUSI ceased to exist, and was replaced with a unitary Republic of Indonesia.

West Kalimantan was the site of substantial fighting during the Indonesia-Malaysia confrontation under the Sukarno government in the mid-1960s. After Suharto deposed Sukarno in 1965, the confrontation was quickly resolved. Domestic conflict continued, however, for another ten years between the new Suharto government and fighters organized during the confrontation and backed by the banned Indonesian Communist Party (PKI). In 1967, Dayak locals waged a campaign of ethnic cleansing against the ethnic Chinese in the interior regions, with support from the Indonesian military, who believed the Chinese were aiding the communists. Thousands of Chinese were killed in the massacres, and tens of thousands became refugees.

Many Madurese migrants moved into the former Chinese lands, leading to renewed ethnic rivalries with the local population. These tensions eventually culminated in major eruptions of violence in 1996-1997 during the Sanggau Ledo riots and in 1999 during the Sambas riots. Hundreds of people, mostly Madurese, were killed during the riots and tens of thousands of Madurese became refugees. These riots also resulted in the ethnic cleansing of the Madurese from the Sambas region.

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