San Juan is the capital city and most populous municipality in the Commonwealth of Puerto Rico, an unincorporated territory of the United States. As of the 2020 census, it is the 57th-largest city under the jurisdiction of the United States, with a population of 342,259. San Juan was founded by Spanish colonists in 1521, who called it Ciudad de Puerto Rico.
Image: The Skyline of San Juan with the Capitol of Puerto Rico
Image: Puerta San Juan SJU 06 2019 8631
Image: El Morro Castle, San Juan, Puerto Rico
Image: San Juan, Puerto Rico 00
Municipalities of Puerto Rico
The municipalities of Puerto Rico are the second-level administrative divisions in the Commonwealth of Puerto Rico. There are 78 such administrative divisions covering all 78 incorporated towns and cities. Each municipality is led by a mayor and divided into barrios, third-level administrative divisions, though the latter are not vested with any political authority. Every municipality is governed as stated by the Autonomous Municipalities Act of 1991, which establishes that every municipality must have an elected strong mayor with a municipal legislature as the form of government. Each legislature must be unicameral, with the number of members related to adequate representation of the total population of the municipality. In contrast to other jurisdictions, both the mayors and the municipal legislators are elected on the same date and for the same term of four years in office.
San Juan, the largest municipality and capital of Puerto Rico.
Bayamón, the second largest municipality of Puerto Rico, located just west of San Juan.
Carolina, the third largest municipality of Puerto Rico, located just east of San Juan.
Ponce, the fourth largest municipality of Puerto Rico and the largest municipality outside the San Juan metropolitan area.