The province is currently represented in the lower house of the Congress of the Philippines through its first and second congressional districts.
Prior to gaining separate representation, areas now under the jurisdiction of Lanao del Sur were represented under the Department of Mindanao and Sulu (1917–1935) and the historical Lanao Province (1935–1961).
[1] The chartered city of Dansalan (renamed to Marawi in 1956[2]), despite being enumerated as part of the territory of neither successor province,[1] was designated as Lanao del Sur's seat of provincial government and became part of its lone congressional district.
Lanao del Sur was represented in the Interim Batasang Pambansa as part of Region XII from 1978 to 1984, and returned two representatives, elected at large, to the Regular Batasang Pambansa in 1984.
Under the new Constitution which was proclaimed on February 11, 1987, the province was reapportioned into two congressional districts;[3] each elected its member to the restored House of Representatives starting that same year.