The municipality was created under Muslim Mindanao Autonomy Act No.

166 dated October 28, 2002, and was ratified through plebiscite on September 4, 2004.

[5][6] It was carved out of the town of Sultan sa Barongis.

Rajah Buayan is politically subdivided into 11 barangays.

Poverty Incidence of Rajah Buayan Source: Philippine Statistics Authority[12][13][14][15][16][17]