Does Puerto Rico Belong to a Continent?

No. Puerto Rico is an archipelago (main island + Vieques, Culebra, smaller cays) in the Caribbean Sea, on the Caribbean Plate—not on the North American or South American continental shelves.

Geological Reality

• Oceanic island arc (volcanic), not continental crust.
• Puerto Rico Trench (north) — deepest Atlantic point (8,376 m) — subduction zone.
• Separated from Hispaniola (Mona Passage, 120 km) and Virgin Islands (Vieques Passage).

Political Geography

• Unincorporated U.S. Territory — not a state, not a country.
• Region: Caribbean / Greater Antilles / West Indies.
• UN Geoscheme: "Caribbean" subregion of "Americas" — but "Americas" is a landmass grouping, not a continent.

Continental Models

• 7-continent model: North America, South America — Puerto Rico on neither.
• 6-continent (combined America): Still an offshore island.
• Plate tectonics: Caribbean Plate — distinct from North & South American plates.

Puerto Rico is politically American, culturally Caribbean, geologically oceanic. It doesn't sit on a continent.