Puerto Rico officially the Commonwealth of Puerto Rico is an unincorporated territory of the United States, located in the northeastern Caribbean east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands. Puerto Rico is an archipelago that includes the main island of Puerto Rico and a number of smaller islands, the largest of which are Vieques, Culebra, and Mona. The main island of Puerto Rico is, by land area, the smallest of the Greater Antilles. With around 3.6 million people, it ranks third in population among that group of four islands, which include Cuba, Hispaniola and Jamaica. The capital and largest city is San Juan. Due to its location, Puerto Rico has a tropical climate and is subject to hot weather all-year-round. The national language is Spanish but English is recognized as an official language as well.