Provinces
Contents
| Region | Population | Capital |
| Adrar | 81 059 | Atar |
| Assaba | 421 603 | Kiffa |
| Brakna | 403 984 | Aleg |
| Dakhlet Nouadhibou | 160 129 | Nouadhibou |
| Gorgol | 434 566 | Kaédi |
| Guidimaka | 345 448 | Sélibaby |
| Hodh ech Chargui | 557 143 | Néma |
| Hodh el Gharbi | 380 480 | Aioun el Atrouss |
| Inchiri | 25 406 | Akjoujt |
| Nouakchott Nord | 474 663 | Dar-Naïm |
| Nouakchott Ouest | 214 509 | Tevragh-Zeïna |
| Nouakchott Sud | 550 681 | Arafat |
| Tagant | 104 738 | Tidjikdja |
| Tiris Zemmour | 68 902 | Zouérate |
| Trarza | 352 878 | Rosso |
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