Before gaining separate representation, areas now under the jurisdiction of Maguindanao del Sur were represented under the Department of Mindanao and Sulu (1917–1935), Cotabato (1935–1972), and Maguindanao (1984–2007, 2010–2022).
Under the new Constitution which was proclaimed on February 11, 1987, Maguindanao del Sur, was retained into one congressional district;[2] each elected its member to the restored House of Representatives starting that same year.
The enactment of Republic Act No. 11550 on May 28, 2021, separated the former province of Maguindanao into the provinces of Maguindanao del Norte and Maguindanao del Sur[3] and its subsequent ratification by plebiscite on September 17, 2022, separated from Maguindanao's second district 25 municipalities to create the province of Maguindanao del Sur. Per Section 9 of R.A. 11550, these new provinces were to comprise a single congressional district; voters began to elect the new province's separate representative beginning in 2025.