Banjarmasin is the largest city in South Kalimantan, Indonesia. It was the capital of the province until 15 February 2022. The city is located on a delta island near the confluence of the Barito and Martapura rivers. Historically the centre of the Banjarese culture, and the capital of the Sultanate of Banjar, it is the biggest city in South Kalimantan and one of the main cities of Kalimantan. The city covers an area of 98.37 km2 (37.98 sq mi) and had a population of 625,481 as of the 2010 Census and 657,663 as of the 2020 Census; the official estimate as of mid 2024 was 681,693. It is the third most populous city on the island of Borneo.