瓦丹（阿拉伯语：وادان）是毛里塔尼亚中部沙漠地区的一个小镇，坐落在阿德拉尔高原（Adrar Plateau），位于欣盖提（Chinguetti）东北93公里处。始建于1147年，1487年成为葡萄牙殖民地，现在大多数地方是废墟。

Ouadane or Wādān (Arabic:وادان‎) is a small town in the desert region of central Mauritania, situated on the southern edge of the Adrar Plateau, 93 km northeast of Chinguetti. The town was a staging post in the trans-Saharan trade and for caravans transporting slabs of salt from the mines at Idjil. A Portuguese trading post was established in 1487, but was probably soon abandoned. The town declined from the sixteenth century and most of the town now lies in ruins.