Wadi Feynan or Wadi Faynan is a major wadi (seasonal river valley) and region in southern Jordan, on the border between Tafilah Governorate and Aqaba and Ma'an Governorates. It originates in the southern Jordanian highlands with the confluence of Wadi Dana and Wadi Ghuweyr, and drains into the Dead Sea via Wadi Araba.
Historically, the area had the largest copper deposits in the Southern Levant, which were intensively exploited from the Chalcolithic (4500–3100 BCE) through to the Mamluk period (1250–1516 CE).
Part of the wadi is included in the Dana Biosphere Reserve. The RSCN opened the first of its eco hotels, the Feynan Ecolodge, there in 2005