It is one of the main islands of Puerto Rico.
Yes it is.
The Dominican Republic is about 90 miles west of Puerto Rico across the Mona Strait.
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.
Isla Mona.
Viegues, Culebra and Mona.
Puerto Rico is a U.S. territorial island in the Caribbean, so it does not share land boundaries with any other country. There are neighboring islands (Haiti & the Dominican Republic to the Northwest, and the Virgin Islands to the Southeast), but these are separated by expanses of the Caribbean Sea.
Viegues, Culebra, Mona and the main island of Puerto Rico.
Puerto Rico is an island in the Caribbean and a territory of the United States, so the closest country to Puerto Rico is the Dominican Republic. It lies to the west of Puerto Rico just across the Mona Strait. The next closest country to Puerto Rico is Great Britain! The British Virgin Islands are to the East of the US Virgin Island which in turn are about 60 miles off Puerto Rico's east coast.
The Mona Passage
There are four major Islands that make up Puerto Rico. Puerto Rico is the name of the main island. Culebra and Vieques are just off the eastern shore, and Isla Mona (uninhibited) is just to the west of the main island. There are over 140 islands that make up the territory of Puerto Rico.
Soy de Puerto Rico. (I'm from Puerto Rico) or Soy puertorriqueño. (I'm a Puerto Rican)
Mona Rico is 5' 2".