The Tigris was the river that, with the Euphrates, formed ancient Mesopotamia’s famous river valley.
The name Mesopotamia comes from Greek and means “land between rivers,” referring principally to the Tigris and Euphrates. Both rivers rise in the highlands of eastern Turkey and flow southward through modern Syria and Iraq before joining near the Persian Gulf.
The Tigris is generally shorter and faster-flowing than the Euphrates. Its waters supported irrigation agriculture, transport, and urban growth, although its unpredictable floods could also damage settlements. Canals connected the river system with fields and cities across southern Mesopotamia.
Major ancient centers on or near the Tigris included Ashur, Nineveh, and Seleucia. The river’s course and surrounding wetlands have changed over time, so the ancient landscape was not identical to the modern one.