| Bay of Arguin | |
|---|---|
| |
 Map of the wider gulf area showing the Banc d'Arguin National Park | |
  Bay of Arguin Location in Mauritania | |
| Coordinates | 20°05′N 16°37′W / 20.08°N 16.62°W |
| Ocean/sea sources | Atlantic Ocean |
| Basin countries | Mauritania |
| Max. length | 13 km (8.1 mi) |
| Max. width | 20 km (12 mi) |
| Islands | Île d’Arguin, Île de l'Ardent |
The Bay of Arguin (French: Baie d'Arguin; Portuguese: Baía de Arguim) is a bay on the Atlantic shore of Mauritania and the former mouth of the Tamanrasset River, now a Paleo-river.