| Official Name: | Aquin |
| Settlement Type: | Commune |
| Pushpin Map: | Haiti |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Haiti |
| Subdivision Type: | Country |
| Subdivision Name: | Haiti |
| Subdivision Type1: | Department |
| Subdivision Name1: | Sud |
| Subdivision Type2: | Arrondissement |
| Subdivision Name2: | Aquin |
| Area Total Km2: | 638.59 |
| Population As Of: | March, 2015 |
| Population Footnotes: | [1] |
| Population Total: | 104,216 |
| Population Density Km2: | 163 |
| Coordinates: | 18.2833°N -73.4°W |
Aquin (in French pronounced as /akɛ̃/; Haitian; Haitian Creole: Aken) is a commune in the Aquin Arrondissement, in the Sud department of Haiti. It is a port on the south coast of the Tiburon Peninsula. It had 104,216 inhabitants in 2015,[1] up from 1,799 in 1950.[2]