Pontianak or Khuntien is the capital of the Indonesian province of West Kalimantan, founded first as a trading port on the island of Borneo, occupying an area of 118.31 km2 in the delta of the Kapuas River at a point where it is joined by its major tributary, the Landak River. The city is on the equator, hence it is widely known as Kota Khatulistiwa (Equatorial City). The city center is less than 3 kilometres (2 mi) south of the equator. Pontianak is the 26th most populous city in Indonesia, and the fifth most populous city on the island of Borneo (Kalimantan) after Samarinda, Balikpapan, Kuching and Banjarmasin. It had a population of 658,685 at the 2020 Census within the city limits, with significant suburbs outside those limits.
The city was founded as a small Malay fishing village at the mouth of the Kapuas River. It then became the seat of the Pontianak Sultanate for several centuries.