| 2000 | 2011 | |
|---|---|---|
| Nouakchott | 263,509 | 361,308 |
| El Hodh El Charghi | 144,828 | 186,729 |
| Assaba | 128,466 | 179,607 |
| Trarza | 138,560 | 178,263 |
| Brakna | 130,146 | 162,972 |
| Gorgol | 126,104 | 161,406 |
| El Hodh El Gharbi | 111,972 | 144,846 |
| Guidimakha | 89,184 | 130,714 |
| Tagant | 40,289 | 46,660 |
| Adrar | 36,091 | 40,383 |
| D. Nouadhibou | 32,670 | 40,213 |
| Tiris Zemour | 19,074 | 23,119 |
| Inchiri | 5,554 | 7,538 |