Regions of Mauritania

Mauritania is divided into 15 regions (wilayat):

During the Mauritanian occupation of Western Sahara (1975–79), its portion of the territory (mainly corresponding to the lower half of Río de Oro province) was named Tiris al-Gharbiyya.

The regions (wilaya) are subdivided into 44 departments; see departments of Mauritania for more information.