Ouadane is a town in north western Mauritania, lying on the Adrar Plateau, north east of Chinguetti. It was founded in 1147 and soon became an important caravan and trading centre.

A Portuguese trading post was established in 1487, but the town declined from the sixteenth century. The old town, a World Heritage Site, though in ruins, is still substantially intact, while a small modern settlement lies outside its gate.