One version mentioned, that traders from the province of Cavite and Batangas shipped their first piñas (Spanish for pineapples) for sale to this town before they were distributed to nearby markets.

Another version related that it was "Las Peñas" (the rocks), evident by the quarrying of stones and adobe which were used to construct buildings and bridges.

Padre Diego Cera se fundió este equilón año de 1820," showing that even during the time of Diego Cera, the town's first parish priest, the town was called "Las Peñas", for some time and eventually was renamed "Las Piñas".

[11] The town of Las Piñas was also a major war theater during the 1896 Philippine Revolution, as it was occupied by forces of General Emilio Aguinaldo.

[13] The town was occupied by the Japanese during World War II and liberated by the combined American and Filipino forces.

[15][16] In an October 1989 privileged speech, Senator Ernesto F. Herrera shared the National Bureau of Investigation's findings that an estimated 40% of Las Piñas' police force was connected with a drug cartel.

[19] On February 12, 1997, President Fidel V. Ramos signed the bill which elevated Las Piñas from municipality into a city.

1941-23 Series of 2023 which sets the territorial boundaries of the 20 barangays Department of Environment and Natural Resources' based on the March 2015 Cadastre survey.

[23] Las Piñas is bounded to the northeast by Parañaque; to the southeast by Muntinlupa; to the west by Bacoor; to the southwest by Dasmariñas; and to the northwest by Manila Bay.

The present physiography of Las Piñas consists of three zones: Manila Bay, coastal margin and the Guadalupe Plateau.

This efficient natural alternative for flood prevention is 80% more cost-effective than traditional riprap techniques such as cement and stone and is also effective for stopping soil erosion.

Like a beehive comb, the net is woven to create openings for plant growth within the cells, allowing their long roots to help secure the soil.

Additional applications for coir fiber involve utilizing it as a potting material for horticulture purposes, in hydroponic systems, and for managing erosion.

The different ways in which it is used have led to a higher need for the coconet, providing a means of income for several Las Piñas locals who turn coconut husks into nets through weaving.

[33] During the 18th century, the fishing village of Las Piñas adopted salt-making techniques with the use of solar dry beds.

Over the years, numerous hectares encircling the ancient town were transformed into salt beds named "irasan".

The initial batch of salt was delivered to every public market in Manila and utilized to enhance the taste of gourmet meals.

The bay area's restoration and the resulting Coastal Road construction caused interference with salt production.

In 2005, an Irasan Center was constructed where visitors could view a salt bed demonstration in commemoration of Las Piñas’ once much celebrated industry.

Each legitimate inhabitant is eligible for complimentary medical care valued at PhP 30,000 supported by the municipal administration.

It has greatly helped in making health care more accessible to the city's residents and improving their overall quality of life.

[49] The Department of Transportation Executive Assistant, Jonathan Gesmundo, announced the successful completion of Phase 1 of the LRT-1 Cavite Extension.

These subsequent phases are expected to further expand the line and improve transit services in the region, with operations slated to begin by 2031.

Daang Hari, which hugs near the boundary with Muntinlupa, and the Aguinaldo Highway (N62) are the major traffic routes toward Cavite.

Jeepneys and buses form the major public transport system, and most of their routes follow the Alabang-Zapote Road.

[50][51] Las Piñas is famous for its Bamboo Organ located inside the St. Joseph Parish Church in the old district of the city.