| Atar | |
| Settlement Type: | Department |
| Native Name: | أطار |
| Mapsize: | 350px |
| Mapsize1: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Adrar Region |
| Seat Type: | Capital |
| Seat: | Atar |
| Area Total Km2: | 26250 |
| Population As Of: | 2013 census |
| Population Total: | 38877 |
| Population Density Km2: | auto |
| Timezone: | +0 |
| Utc Offset: | +0 |
Atar is a department of the Adrar Region in western Mauritania. [1] The capital lies at Atar. The other villages in the department are Ain Ehel Taya, Tawaz, Azougui and Choum.
The Atar constituency covers the same area as the department. In 2018 there were a total of 25,023 registered voters and they own 2 seats in the Mauritanian congress, It is the only constituency in Adrar region to own more than 1 seat in congress.