Markha (Russian: Марха́; Yakut: Марха өрүс, Marxa örüs) is a river in the Sakha Republic in Russia. It is a left tributary of the Vilyuy (in the drainage basin of the Lena). The Markha is 1,181 kilometres (734 mi) long, with a drainage basin of 99,000 square kilometres (38,000 sq mi). Its average discharge is 405 cubic metres per second (14,300 cu ft/s).

The river has its sources on the Vilyuy Plateau, a part of the Central Siberian Plateau. It joins the left bank of the Vilyuy 518 km (322 mi) from its mouth.

• List of rivers of Russia

• Media related to Markha River at Wikimedia Commons