The Banjar or Banjarese (Urang Banjar; Galambang Banjar) are an Austronesian ethnic group native to the Banjar regions (notably Banjarmasin, Banjarbaru, Banjar Regency, etc.) in the southeastern Kalimantan regions of Indonesia. Nowadays, Banjarese diaspora can be found in neighbouring Banjar regions as well; including Kotabaru Regency, the southeastern regions of Central Kalimantan, southernmost regions of East Kalimantan, and some provinces of Indonesia in general. The Banjarese diaspora community also can be found in neighbouring countries of Indonesia, such as Brunei, Malaysia (notably in Sabah and Perak), and Singapore.
Etymologically, the word Banjar is derived from terminology in the Janyawai dialect of Ma'anyan language, which rooted from Old Javanese language. It is initially used to identified the Ma'anyan, Meratus Dayak, and Ngaju people who are already "Javanized" when the Javanese people arrived in the southeastern Kalimantan regions to established their civilization. The term banjar (ꦧꦚ꧀ꦗꦂ) itself in Javanese language is a short form of a verb mbanjarke (ꦩ꧀ꦧꦚ꧀ꦗꦂꦏꦺ), which means "to separate and rearrange" literally. It is 'common knowledge' within the communities of South Kalimantan that the Banjarese people were formerly part of larger Dayak community.
The Proto-Malay people migrated to Borneo in 2500 BC and were the ancestors of the Dayak people. In 2500 BC, the Deutero Malays migrated to Borneo. The Sumatran people brought their culture to Borneo in 400 AD. The fusion of the cultures saw the birth of the Upper Banjar language (Bahasa Banjar Hulu). Later, in 520 AD, the Sumatran people formed the Buddhist Kingdom of Tanjungpuri in the present-day region of Tanjung, Tabalong.
In 14th century, Empu Jatmika migrating from Keling, Kediri built the Hindu Kingdom of Negara Dipa by the river of Tapin. Which later came to be ruled under Majapahit's Rajasa dynasty. This was the start of the Javanese-style courts in South Kalimantan. This Hindu era in South Kalimantan remained influential period in South Kalimantan's history.