Regions of Mauritania
Mauritania is divided into 15 regions :
| Map key | Name | Native name | Capital | Area | Population |
| 1 | Adrar | أدرار | Atar | 71,623 | |
| 2 | Assaba | لعصابة | Kiffa | 451,804 | |
| 3 | Brakna | لبراكنة | Aleg | 391,310 | |
| 4 | Dakhlet Nouadhibou | داخلة نواذيبو | Nouadhibou | 184,459 | |
| 5 | Gorgol | كوركول | Kaédi | 442,490 | |
| 6 | Guidimaka | غيديماغا | Sélibaby | 363,075 | |
| 7 | Hodh Ech Chargui | الحوض الشرقي | Néma | 625,643 | |
| 8 | Hodh El Gharbi | الحوض الغربي | Ayoun el Atrous | 403,091 | |
| 9 | Inchiri | إينشيري | Akjoujt | 29,484 | |
| 10 | Nouakchott-Nord | نواكشوط الشمالية | Dar-Naim | 614,465 | |
| 10 | Nouakchott-Ouest | نواكشوط الغربية | Tevragh-Zeina | 204,881 | |
| 10 | Nouakchott-Sud | نواكشوط الجنوبية | Arafat | 627,415 | |
| 11 | Tagant | تكانت | Tidjikja | 114,760 | |
| 12 | Tiris Zemmour | تيرس زمور | Zouérat | 79,129 | |
| 13 | Trarza | الترارزه | Rosso | 323,903 |
During the Mauritanian occupation of Western Sahara, its portion of the territory was named Tiris al-Gharbiyya.
The regions are subdivided into 44 departments; see departments of Mauritania for more information.