| population | |
| Adrar | 59670 |
| Assaba | 285142 |
| Brakna | 256827 |
| Dakhlet Nouadhibou | 80181 |
| Gorgol | 274337 |
| population | |
| Guidimaka | 219674 |
| Hodh ech Chargui | 298625 |
| Hodh El Gharbi | 243246 |
| Inchiri | 11500 |
| Nouakchott Nord | 367000 |
| population | |
| Nouakchott Ouest | 165000 |
| Nouakchott Sud | 425000 |
| Tagant | 64808 |
| Tiris Zemmour | 63306 |
| Wilaya du Trarza | 269946 |
