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Bulacan (PSGC: (031400000 ); ISO: PH-BUL) is a first class province of the Philippines, located in the Central Luzon Region (Region III) in the island of Luzon, 11 km north of Metropolitan Manila (the nation's capital), and part of the Metro Luzon Urban Beltway Super Region. Bulacan was established 15 August 1578.
It has 569 barangays from 21 municipalities and three component cities (Malolos, the capital city; Meycauayan; and San Jose del Monte). Bulacan is located immediately north of Metro Manila. Bordering Bulacan are the provinces of Pampanga to the west, Nueva Ecija to the north, Aurora and Quezon to the east, and Metro Manila and Rizal to the south. Bulacan also lies on the north-eastern shore of Manila Bay.
In the 2010 census, Bulacan had a population of 3,124,433 people, the highest population in Region 3 and most populous province in the whole Philippines.〔 Bulacan's most populated city is San Jose del Monte, the most populated municipality is Santa Maria while the least populated is Doña Remedios Trinidad.
In 1899, the historic Barasoain Church in Malolos was the birthplace of the First Constitutional Democracy in Asia. It is also the cradle of the nation's noble heroes, of great men and women; also home to many of the country's greatest artists, with a good number elevated as National Artists.
Today, Bulacan is among the most progressive provinces in the Philippines. Its people — the Bulaqueños (or ''Bulakenyo'' in Filipino)— are regarded as highly educated, enterprising and industrious. It is well known for the following industries: marble and marbleized limestone, jewelry, pyrotechnics, leather, aquaculture, meat and meat products, garments, furniture, high-value crops, sweets and native delicacies, and a wide variety of high-quality native products.
Five symbols are incorporated into the official seal of the province, each representing a facet of Bulacan's history and people:
;Mountains:Represents the ''Kakarong'' and ''Biak-na-bato'' hills, site of the Pact of Biak na Bato
;Church:Barasoain Church, birthplace of the very first ''Constitucion Politica Filipina'' (Malolos Constitution) and site of the proclamation of the First Philippine Republic
;Flower:''Sampaguita'' (Jasminum sambac), provincial flower
;Bamboo Enclosure: Reflects the ''Bulakenyo Spirit''- resilient and strong against "typhoons"
;Thorns: Reflects the bravery of ''Bulakenyos''
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