The Flag of East Kalimantan, Indonesia, is the official symbol representing the province located on the island of Borneo. Adopted on November 20, 1958, it consists of a white field divided diagonally by two equally wide bands that form a red X in the middle. The upper band is green, and the lower one is yellow, symbolizing natural resources and wealth found in the region. The red X represents courage and strong determination, reflecting East Kalimantan’s resilience throughout its history.