Ouest (department)
| Ouest Lwès | |
|---|---|
| Taïno Beach, Grand-Goâve | |
| Ouest in Haiti | |
| Country | Haiti | 
| Capital | Port-au-Prince | 
| Région | South-Central | 
| Symbole | Boat, tower, queen bee | 
| Government | |
| • Type | Departmental Council | 
| Area | |
| 4,982.56 km2 (1,923.78 sq mi) | |
| Population  (2015) | |
| 4,029,705 | |
| • Density | 810/km2 (2,100/sq mi) | 
| • Urban | 3,397,404 | 
| • Rural | 632,301 | 
| Time zone | UTC-05:00 (EST) | 
| • Summer (DST) | UTC-04:00 (EDT) | 
| ISO 3166 code | HT-OU | 
| HDI (2022) | 0.582 medium · 1st | 
Ouest (French, pronounced [wɛst] ⓘ) or Lwès (Haitian Creole; both meaning "West") is one of the ten departments of Haiti. It is located in south-central Haiti, linking the Great-North and the Tiburon Peninsula.
It is the jurisdictional seat of the national capital, the city of Port-au-Prince.
It has an area of 4,982.56 square kilometres (1,923.78 sq mi) and a population of 4,029,705 (2015 estimate), making it both the largest department by area and the most populated department in Haiti.