| Region | Spelled | Pop-2000 | Pop-1988 | Area(km.²) | Area(mi.²) | Capital |
|---|---|---|---|---|---|---|
| Adrar | Septieme | 60,847 | 61,043 | 215,300 | 83,100 | Atar |
| Assaba | Troisieme | 249,596 | 168,123 | 36,600 | 14,100 | Kiffa |
| Brakna | Cinquieme | 240,167 | 192,157 | 33,800 | 13,100 | Aleg |
| Dakhlet Nouadhibou | Huitieme | 75,976 | 63,030 | 22,300 | 8,600 | Nouadhibou |
| Gorgol | Quatrieme | 248,980 | 184,359 | 13,600 | 5,300 | Kaedi |
| Guidimaka | Dixieme | 186,697 | 116,436 | 10,300 | 4,000 | Selibaby |
| Hodh ech Chargui | Premiere | 275,288 | 212,203 | 182,700 | 70,500 | Nema |
| Hodh el Gharbi | Deuxieme | 219,167 | 159,296 | 53,400 | 20,600 | Aioun el Atrouss |
| Inchiri | Douzieme | 11,322 | 14,613 | 46,800 | 18,100 | Akjoujt |
| Nouakchott | 611,883 | 393,325 | 1,000 | 400 | Nouakchott | |
| Tagant | Neuvieme | 61,984 | 64,908 | 95,200 | 36,800 | Tidjikdja |
| Tiris Zemmour | Onzieme | 53,586 | 33,147 | 252,900 | 97,600 | Zouerate |
| Trarza | Sixieme | 252,664 | 202,596 | 67,800 | 26,200 | Rosso |
| 13 divisions | 2,548,157 | 1,865,236 | 1,031,700 | 398,300 |
Mauritania Africa Map
Description : Mauritania Political map showing the international boundary, regions boundaries with their capitals and national capital.