1. Cuba: Cuba is the largest island of the Caribbean and is home to over 11 million people, making it the most populous Spanish-speaking island. The official language of Cuba is Spanish and it is spoken by almost the entire population.
2. Puerto Rico: Puerto Rico is a United States territory located in the Caribbean and is home to over 3 million people. Spanish is the official language of Puerto Rico and is spoken by the majority of the population, although English is also widely spoken.
3. The Dominican Republic: The Dominican Republic is located on the island of Hispaniola in the Caribbean and is home to over 10 million people. Spanish is the official language of the Dominican Republic and is spoken by almost the entire population.
4. Jamaica: Jamaica is an island nation in the Caribbean located south of Cuba and Hispaniola. Jamaican Patois, which is a creole language based on English and African languages, is widely spoken in Jamaica, but English is the official language. Spanish is also spoken by a small minority of the population.
5. Trinidad and Tobago: Trinidad and Tobago is an island nation located off the coast of Venezuela. The official language of Trinidad and Tobago is English, but Spanish is also spoken by a significant portion of the population.