Wadi Zahr (Arabic: وادي ظهر‎ Wādī Ẓahr), also spelled Wadi Dahr (Arabic: وادي ضهر‎ Wādī Ḍahr), is a wadi in Yemen, located just north of Sanaa on the western edge of the Sanaa plain. It is watered by a perennial stream whose source is the large catchment area on the eastern slopes of Jabal an-Nabi Shu'ayb. The wadi proper begins near the village of Suq Bayt Naʽam and then flows eastward for about 7km through a steep-sided gorge before ending on the Sanaa plain. Wadi Zahr has fertile soil and was historically a strategic area with several forts. The main settlement in the area today is Qaryat al-Qabil.