Pangkalan Bun or Pangkalanbuun is a city (population: around 200,000) in Central Kalimantan province on Borneo in Indonesia. It is the administrative headquarters of South Arut district and also the capital of West Kotawaringin Regency in the south-west part of central Kalimantan.
Pangkalan Bun is served by Iskandar Airport. Several airlines fly to this airport. Shipping services provide connections to Jakarta, Surabaya, and Semarang.
Birutė Galdikas established her base, Camp Leakey, for the study and conservation of orangutans about 30 miles (48 km) from Pangkalan Bun up the Sekonyer River.The site has expanded from the original hut in 1971. Its facilities, supported by the Orangutan Foundation International, are a part of the Tanjung Puting National Park.