Diban (Arabic: ذِيبَان, romanized: Ḏībān, also spelled Thiban or Zeiban) is a town in eastern Syria, administratively part of the Deir ez-Zor Governorate, located along the eastern bank of the Euphrates River, south of Deir ez-Zor, 17 kilometers south of al-Busayrah and 13 kilometers north of Al-Asharah.

It is the administrative seat of a nahiyah ("subdistrict") which consists of ten localities with a total population of 65,079 in 2004.

Tell Diban is identified with the ancient Aramean city of Rummunina,[2][3] a probable derivation of the Aramaic word rumman ("pomegranate").

[2] The area and its surrounding fields served as a pre-war camp for Assyrian king Tukulti-Ninurta II's army during his last military campaign in 885 BCE.

[4] On 25 September 2023, 18 local gunmen, three SDF members and a civilian were killed in clashes in the town.