Maguindanao del Sur, officially the Province of Maguindanao del Sur (Maguindanaon: Dairat nu Salatan Magindanaw, Jawi:دايرت نو سلاتان مڬیندانو ), is a landlocked province in the Philippines located in the Bangsamoro region in Mindanao.

It borders Cotabato province to the east, Maguindanao del Norte to the west, and Sultan Kudarat to the south.

[1][2] However an issue arose since the determination of the first set of officials of the province presumes that the plebiscite was held prior to the 2022 national and local elections.

[4][5] The position was issued on September 28, 2022, where the election body conclude that only the Department of the Interior and Local Government could appoint the first officials of the province.

Being landlocked, it is bounded by Maguindanao del Norte to the west, Cotabato to the north and east, and Sultan Kudarat to the south