Markha (Russian: Марха) 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 1181 km long, with a drainage basin of 99 000 km². Its average discharge is 405 m³/sek. The river has its sources on the Vilyuy Plateau, a part of the Central Siberian Plateau.