page_title: San Juan, Puerto Rico
section_title: Barrios
hierarchical_section_title: San Juan, Puerto Rico / Cityscape / Barrios
caption_attribution_description: English: Map of Puerto Rico with subdivision in municipal districts
context_page_description: San Juan is the capital and most-populous municipality in the Commonwealth of Puerto Rico, an unincorporated territory of the United States. As of the 2010 census, it is the 46th-largest city under the jurisdiction of the United States, with a population of 395,326. San Juan was founded by Spanish colonists in 1521, who called it Ciudad de Puerto Rico. Puerto Rico's capital is the third oldest European-established capital city in the Americas, after Santo Domingo, in the Dominican Republic, founded in 1496 and Panama City, in Panama, founded in 1519. Several historical buildings are located in San Juan; among the most notable are the city's former defensive forts, Fort San Felipe del Morro and Fort San Cristóbal, and La Fortaleza, the oldest executive mansion in continuous use in the Americas.
  Today, San Juan is Puerto Rico's most important seaport and is the island's manufacturing, financial, cultural, and tourism center.
context_section_description: What is now known as Old San Juan occupied the western end of a rocky islet, the Isleta de San Juan, at the mouth of San Juan Bay. During the 20th century, the main population centers surged well beyond the walls of the old city and onto Puerto Rico's main island, and merged with the existing settlements east and south of Old San Juan. With the annexation of Río Piedras in 1951, the municipality of San Juan grew four times its previous size. As a result, the municipality also went from 2 to 18 barrios (wards), 16 of which fall within the former municipality of Río Piedras. Eight of the 18 barrios are further subdivided into subbarrios, including the two barrios (San Juan Antiguo and Santurce) that belonged to the original municipality of San Juan. The 18 barrios are:
  Caimito
  Cupey
  El Cinco
  Gobernador Piñero
  Hato Rey Central
  Hato Rey Norte
  Hato Rey Sur
  Monacillo
  Monacillo Urbano
  Oriente
  Pueblo
  Quebrada Arenas
  Sabana Llana Norte
  Sabana Llana Sur
  San Juan Antiguo (not to be confused with Old San Juan, a historic district with some overlapping areas)
  Santurce
  Tortugo
  Universidad
caption: San Juan and Rio Piedras as separate municipalities on map of 1915
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