The Legislative district of Las Piñas–Muntinlupa was the combined representation of the Metropolitan Manila municipalities (now highly urbanized cities) of Las Piñas and Muntinlupa in the lower house of the Congress of the Philippines from 1987 to 1998.
Since 1998, each has been represented separately through the lone congressional districts of Las Piñas and Muntinlupa.
Under the new Constitution which was proclaimed on 11 February 1987, the independent Metro Manila municipalities of Las Piñas and Muntinlupa constituted a single congressional district,[1] and elected its member to the restored House of Representatives starting that same year.
7926 and its subsequent approval by plebiscite on 8 May 1995 converted Muntinlupa into a highly urbanized city.
This separation was additionally confirmed in the city charter of Las Piñas (R.A. 8251[3]) which was approved by plebiscite on 26 March 1997.