The Markha (Russian: Марха) is a river of Sakha Republic, Russia, a tributary of the Lena.

The Markha heads mainly towards the SSE along its course, parallel to the Markhachan in the east.

Towards its final stretch it bends southeastwards and joins the left bank of the Lena 1,928 km (1,198 mi) from its mouth.

The river freezes in the second half of October and stays under ice until the middle of May.

[1] The largest tributary of the Markha is the 184 km (114 mi) long Namyldzhylakh from the right.