| Zangmar | |
| Pushpin Map: | Iran |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Iran |
| Mouth: | Aras |
| Mouth Coordinates: | 39.3522°N 45.0853°W |
The Zangmar (also known as the Ṭłmut River) is a river in Maku County, West Azarbaijan Province, Iran. It originates in the Zagros Mountains above Maku, Iran along the Iran–Turkey border, not far from Mount Ararat and flows south and east into the Araxes at the town of Pol Dasht.
A major tributary of the Zangmar is the Barun River which is dammed at 39.1881°N 44.4819°W some 12miles above Maku, forming the Maku-Barun reservoir. The dam is rammed earth and riprap with a clay lining 78m (256feet) high, impounding some 135000000m2 of water.[1]
Beyond Maku, the Zangmar flows past Tappeh Bashi-ye Namaz, and Moradluy-e Olya before entering the Araxes.