Puerto Rico, officially the Commonwealth of Puerto Rico is a Caribbean island and unincorporated territory of the United States. It is located in the northeast Caribbean Sea, approximately 1,000 miles southeast of Miami, Florida. The Commonwealth is an archipelago among the Greater Antilles located between the Dominican Republic and the U.S. Virgin Islands; it includes the eponymous main island and several smaller islands, such as Mona, Culebra, and Vieques.