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Metropolitan Manila (Filipino: Kalakhang Maynila), commonly shortened to Metro Manila and formally the National Capital Region (NCR; Filipino: Pambansang Punong Rehiyon), is the capital region and largest metropolitan area of the Philippines. Located on the eastern shore of Manila Bay, the region lies between the Central Luzon and Calabarzon regions. Encompassing an area of 619.57 km2 (239.22 sq mi) and with a population of 13,484,462 as of 2020, it is composed of sixteen highly urbanized cities: the capital city, Manila, Caloocan, Las Piñas, Makati, Malabon, Mandaluyong, Marikina, Muntinlupa, Navotas, Parañaque, Pasay, Pasig, Quezon City, San Juan, Taguig, and Valenzuela, along with one independent municipality, Pateros. As the second most populous and the most densely populated region in the Philippines, it ranks as the 9th most populous metropolitan area in Asia and the 6th most populous urban area in the world.
The region is the center of culture (including arts and entertainment), economy, education and government of the Philippines. Designated as a global power city, the region exerts a significant impact on commerce, finance, media, art, fashion, research, technology, education, and entertainment, both locally and internationally. It is the home to all embassies in the Philippines, thereby making it an important center for international diplomacy in the country. Its economic power makes the region the country's premier center for finance and commerce. The region accounts for 36% of the gross domestic product (GDP) of the Philippines. Greater Manila is ASEAN fourth largest economy after Singapore, Jakarta and Bangkok.
In 1975, in response to the need to sustain the growing population and to create the center of political power and the seat of the government of the Philippines, the built-up area centered on Manila was formally recognized as a metropolitan area through Presidential Decree No. 824. A year later, Presidential Decree No. 879 established Metro Manila as an administrative region, retaining its earlier status as a metropolis, and was designated as Region IV, with the remainder of the Southern Tagalog region being designated as Region IV-A. Finally, in 1978, Metro Manila became the National Capital Region (NCR) of the Philippines, discontinuing its numerical designation and reverting it to Southern Tagalog.