Atar Department
| Atar أطار | |
|---|---|
| Country | Mauritania | 
| Region | Adrar Region | 
| Capital | Atar | 
| Area | |
|  • Total | 26,250 km2 (10,140 sq mi) | 
| Population  (2013 census) | |
|  • Total | 38,877 | 
| • Density | 1.5/km2 (3.8/sq mi) | 
| Time zone | UTC+0 (+0) | 
Atar is a department of the Adrar Region in western Mauritania. The capital lies at Atar. The other villages in the department are Ain Ehel Taya, Tawaz, Azougui and Choum.