Originally a district of the former Moro Province, on September 1, 1914, the defunct Department of Mindanao and Sulu provided with autonomous government through Act No.

Davao, Lanao and Zamboanga were then later split and partitioned into different current provinces, Sulu was then later split and partitioned into the current provinces of Sulu and Tawi-Tawi, and Bukidnon mostly remain what it is today.

[3] It was dissolved on 1973, comprising what are now the provinces of Cotabato (North), South Cotabato, Maguindanao del Norte, Maguindanao del Sur, Sultan Kudarat, and Sarangani.

[2] That very same day, the provincial capital was moved from Cotabato City to Pagalungan.

[6] On March 16, 1992, the province of Sarangani was formed out of South Cotabato.