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Markha (Russian: Марха́) is a river in the republic of Sakha in Russia. It is a left tributary of the Vilyuy River (in the drainage basin of the Lena River). 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.
Coordinates: 66°09′01″N 111°19′08″E / 66.15028°N 111.31889°E