Las Piñas, officially the City of Las Piñas (Tagalog: Lungsod ng Las Piñas), is a city in the National Capital Region of the Philippines. According to the 2015 census, it has a population of 588,894.

Las Pinas was established as a small fishing port and became a major sea salt-producing municipality, through the use of salt evaporation ponds, dating back to the Spanish Era, the city has grown into an important residential, commercial and industrial suburb of Metro Manila.

The Sarao Motors factory, also located in Las Piñas, is the place where jeepneys are assembled piece by piece in painstaking individual production. The factory remains open to buyers and curious tourists all year round.

Las Piñas also houses SM Southmall, which has an area of 205,120 square meters and is located along Alabang–Zapote Road. The newest shopping mall development in the city is Robinsons Place Las Piñas. The first high-rise building in the city is the 16-storey residential Almanza Metropolis while more high-rise buildings will rise in the city soon including South Residences at SM Southmall a 4 tower 15 storey condominium.

Aside from being famous in music due to the historical significance of the Bamboo Organ and the yearly International Bamboo Organ Festival at St. Joseph Parish, Las Piñas is also known as the home for London College of Music Examinations of the University of West London through the Saraza Music Center which was appointed in 2013 as the first and only public examination centre in the Philippines for London College of Music. The Saraza Music Centre is an International music centre Located in BF Resort Las Piñas with International sister (co-owned) school in Gading Serpong Indonesia.

Besides being famous for its Bamboo Organ, which was built by Fr. Diego Cera and completed in 1824, the town of Las Piñas was also a major war theater during the 1896 Philippine Revolution, as it was occupied by forces of Gen. Emilio Aguinaldo. Las Piñas was occupied by the Japanese during World War II and liberated by the combined American and Filipino forces.

In 1901, the municipality of Las Piñas was separated from Manila and incorporated to the newly created province of Rizal pursuant to the Philippine Commission Act No. 137. Two years later, in accordance with Act No. 942, it was combined with the town of Parañaque, with the latter as the seat of a new municipal government.

It was separated from Parañaque to become an independent municipality again on 27 March 1907 by virtue of Philippine Commission Act No. 1625. On 7 November 1975, through Presidential Decree No. 824, Las Piñas was excised from the province of Rizal to form Metro Manila. Las Piñas became one of the municipalities making up the region.

Las Piñas, like other cities of the Philippines, is a local government unit whose powers and functions are specified by the Local Government Code of the Philippines. In general, as a city, Las Piñas is headed by a mayor who heads the city's executive function and the vice mayor who heads the city's legislative function, which is composed of twelve councilors, six each from the city's two city council districts. For representation, the city is considered as one district, and therefore one representative, in the country's House of Representatives.

Additionally, like other cities and municipalities, Las Piñas is subdivided into barangays.

The road network of Las Piñas are radial in nature, and primarily relies on the Alabang–Zapote Road (N411), which serves as the city's road network backbone. The Manila-Cavite Expressway (formerly Coastal Road, and numbered E3), a toll expressway serves as the major traffic route towards Manila. Daang Hari, which hugs near the boundary with Muntinlupa, and the Aguinaldo Highway (N62) are the major traffic routes toward Cavite. The Muntinlupa-Cavite Expressway (MCX), that leads to South Luzon Expressway, supplements Daang Hari as an alternate to the congested Alabang-Zapote Road over Alabang and Ayala Alabang in Muntinlupa.

The road network in Las Piñas suffers from traffic jams, especially on the primary artery, Alabang-Zapote Road, which carried more than 70,000 vehicles daily as of 2016. Public transport, like buses and jeepneys, fill up Alabang-Zapote Road, therefore causing further congestion. The city government petitioned the Land Transportation Franchising and Regulatory Board (LTFRB) to suspend issuing of franchises on bus and jeepneys routes that uses Alabang-Zapote Road.

The Las Piñas Friendship Route network serves as the alternate routes on the congested routes, but motorists have to obtain a sticker to use them, as most roads of the network are located in privately owned subdivisions (gated communities), like BF Homes, Pilar Village, and BF Resort.

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