| Official Name: | Bir Moghrein |
| Native Name: | بئر مغرين |
| Pushpin Map: | Mauritania |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 200 |
| Pushpin Map Caption: | Location in Mauritania |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: | Mauritania |
| Subdivision Name1: | Tiris Zemmour |
| Population As Of: | Census 2013 |
| Population Total: | 3,897 |
| Population Urban: | 1,613 |
| Coordinates: | 25.2167°N -48°W |
Bir Moghrein is a city with 3,897 residents (Census 2013)[1] [2] in Tiris Zemmour region of northern Mauritania, close to the border with Western Sahara.