Wadi Sirhan (; translation: Valley of Sirhan) is a wide depression in the northwestern Arabian Peninsula. It runs from the Azraq oasis in Jordan southeastward into Saudi Arabia, where most of the valley is located. It historically served as a major trade and transportation route between Syria and Arabia. From antiquity until the early 20th century, control of Wadi Sirhan was often contested by various Arab tribes. The valley is called after the Sirhan tribe which migrated there in the mid-17th century.