The capital and largest city of Puerto Rico is San Juan. San Juan is located in northern Puerto Rico and covers an area of about 80 square miles. The city had an estimated population of about 400,000 people as of 2010.
The Commonwealth of Puerto Rico is an unincorporated territory of the United States, comprising an island situated in the Caribbean between the Caribbean Sea and the North Atlantic Ocean, to the east of the Dominican Republic. Puerto Rico has a total area of about 3,500 square miles, making it a little less than three times the size of Rhode Island. Puerto Rico has a population of about 3.6 million people as of 2014.