ABSTRACT : Islam and the Banjar Kingdom are inseparable. The two have a close, mutually supportive relationship. The successful development of Islam in South Kalimantan and its adoption by the majority of the South Kalimantan population (97.02%) is inextricably linked to the role of the Banjar Kingdom in fostering and developing it. Furthermore, the Banjar Kingdom’s founding, growth, and development, becoming a major kingdom, were largely due to Islam. Historians agree that Prince Samudera, the founder of the Banjar Kingdom, received assistance from the Islamic Kingdom of Demak in his war against the Kingdom of Negara Daha. After victory, he converted to Islam and made Islam the official religion of the kingdom. However, historians differ on the date of the Banjar Kingdom’s formation and when Islam first entered South Kalimantan. This article aims to analyze opinions regarding the formation of the Banjar Kingdom and the arrival of Islam in South Kalimantan. The research method used is library research with a historical approach. The results indicate that the opinion that the Banjar Kingdom was founded in 1540 is more acceptable for various reasons. However, Islam arrived in South Kalimantan not simultaneously with the formation of the Banjar Kingdom, but long before it.
KEYWORDS : Islam, Banjar Kingdom, Daha Kingdom, Demak Kingdom, Prince Samudera