Port-au-Prince is the capital and most populous city of Haiti. The city's population was estimated at 1,200,000 in 2022 with the metropolitan area estimated at a population of 2,618,894. The metropolitan area is defined by the IHSI as including the communes of Port-au-Prince, Delmas, Cite Soleil, Tabarre, Carrefour, and Pétion-Ville.

Haitian Creole, or simply Creole, is a French-based creole language spoken by 10 to 12 million people worldwide, and is one of the two official languages of Haiti, where it is the native language of the vast majority of the population. Northern, Central, and Southern dialects are the three main dialects of Haitian Creole. The Northern dialect is predominantly spoken in Cap-Haïtien, Central is spoken in Port-au-Prince, and Southern in the Cayes area.