| 2000 | 2011 | |
|---|---|---|
| Nouakchott | 558,195 | 765,365 |
| El Hodh El Charghi | 281,600 | 363,071 |
| Trarza | 268,220 | 345,076 |
| Assaba | 242,265 | 338,708 |
| Gorgol | 242,711 | 310,656 |
| Brakna | 247,006 | 309,307 |
| El Hodh El Gharbi | 212,156 | 274,443 |
| Guidimakha | 177,707 | 260,459 |
| D. Nouadhibou | 79,516 | 97,875 |
| Tagant | 76,620 | 88,736 |
| Adrar | 69,542 | 77,812 |
| Tiris Zemour | 41,121 | 49,842 |
| Inchiri | 11,500 | 15,609 |