Haiti is outside of the Caribbean.
The Association of Caribbean States ( ACS ; Asociación de Estados del Caribe Association des États de la Caraïbe ) is a union of nations centered on the Caribbean Basin . Haiti ( [ ˈheɪti ] Haïti [ a.iti ] Ayiti [ ajiti ] ) , officially the Republic of Haiti and formerly called Hayti , is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean Sea . Haiti is 27750 km2 in size and has an estimated 10.6 million people , making it the most populous country in the Caribbean Community ( CARICOM ) and the second-most populous country in the Caribbean as a whole . It is a founding member of the United Nations , Organization of American States ( OAS ) , Association of Caribbean States , and the International Francophonie Organisation . In addition to CARICOM , it is a member of the International Monetary Fund , World Trade Organization , and the Community of Latin American and Caribbean States .