ولاية إليزي
Agadez Region borders Algeria (Tamanrasset Province and Illizi Province) and Libya (Murzuq District) to the north, Chad to the east, Diffa Region, Zinder Region, Tahoua Region and Maradi Region to the south, and Mali (Kidal Region) to the west. It is by far the largest region of the country, representing 52% of the total area of Niger. The region is dominated by the Sahara desert, and includes the vast Ténéré portion of that desert, as well as dune seas such as the Erg of Bilma. The Aïr Mountains, the tallest peaks in Niger, are also located here. The Djado Plateau is located in the far north.