Ouest (French) or Lwès is one of the ten departments of Haiti. It is located in south-central Haiti, linking the Great-North and the Tiburon Peninsula.

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.