What are the neighboring countries of Puerto Rico?
The Dominican Republic.
Puerto Rico is the easternmost of the larger islands known as the Greater Antilles : Jamaica, Cuba, Hispaniola, and Puerto Rico. Puerto Rico has the North Atlantic Ocean to its north, the Virgin Islands to its east, the Caribbean Sea to its south, and the Dominican Republic (on Hispaniola) to its west. The closest point of Puerto Rico to Hispaniola is Isla Mona, and the uninhabited Isla Desecheo, in the Mona Passage.