Kotawaringin Sultanate

Kotawaringin, or also spelled Kota Waringin, was a sultanate on the south coast of Borneo. It covered an area in what is now the western part of the Indonesian province of Central Kalimantan. It then had a brief existence as an autonomous "native state" in the United States of Indonesia between 1949 and 1950, before being formally created as a separate Kotawaringin Regency within what was then the Province of South Kalimantan. However, on 26 June 1959, Kotawaringin Regency was divided into a West Kotawaringin Regency and East Kotawaringin Regency.

Former territory

On 10 April 2002 additional regencies were created by splitting the two existing regencies — Sukamara and Lamandau from parts of West Kotawaringin Regency, and Seruyan and Katingan from parts of East Kotawaringin Regency.
In recent years, there has been some research into local attitudes, with a view to the putative re-establishment of Kotawaringin as a separate province, separate from the rest of Central Kalimantan, based upon the recognition of a shared identity of "Orang Kotawaringin". Such a province would cover an area of some 71,600 km² and would have a population as at 2023 of some 1.25 million people.