Damour river or (Arabic: نهر الدامور, Nahr Al Damour) is a 37.5-kilometre (23.3 mi) coastal river in the Mount Lebanon Governorate in Lebanon. The river's headwaters originate on and around the slopes of the 1,943-meter peak Jabal el-Barouk, site of a nature preserve where some of Lebanon's largest and oldest Cedars of Lebanon are found, and flows west through the Jisr Al-Kadi valley, where it receives water from the creeks of the Chouf mountains. The river flows towards the Mediterranean Sea, south of Damour, which is both the largest town on its banks and the one which bears the river's name.

During the Phoenician time, Canaanite people being affected by drought seasons, called the river "Damoros" ancient Tamyrus,^[2] in the attribution of 'Damoros' god of immortality, related to 'Achtarout', god of love and beauty. This attribution symbolized the immortality of the river 'Arabic: النهر الدامر' and the beauty of the region.

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The city was founded on the river's edge by poor people who wanted to charge the right of way to the emirs. Because the river has a big flow rate in the winter season, residents assured the transport of passengers from one side to the other, obliging passengers to pay dearly for this service.