The Tagant Plateau is located in eastern Mauritania, forming a stony part of the Sahara Desert.

Some towns are located at the foot of the Tagant Plateau's slopes, which form cliffs in some places.

The Assaba Massif, where Late Ordovician glacial formations have been identified, is a southward prolongation of the Tagant Plateau.

[1] The Aoukar, the dry basin of a former lake lies beyond the southern escarpments of the Tagant Plateau.

[2] Beginning in mid-17th century, migrants from the Adrar Plateau region moved in and displaced the native population of the Tagant Plateau, the Toucouleur people, who now inhabit Futa Toro along the Senegal river.