Confidence votes 4.1K. Puerto Rico is an island... Puerto Rico is a Caribbean island that is part of the US, however the Caribbean Islands are grouped together with the mainland of North America.So Puerto Rico is part of North America both physically and politically.uerto Rico is part of Insular America. The Caribbean is not considered North, Central or South American. T â¦ he British Virgin Islands are part of the UK, politically, but they're not considered Europe.