| Markha | |
| Source1 Location: | Muosaany Lake |
| Source1 Coordinates: | 66.1503°N 111.3189°W |
| Mouth: | Vilyuy |
| Mouth Coordinates: | 63.4664°N 118.9031°W |
| Subdivision Type1: | Country |
| Length: | 1181km (734miles) |
| Discharge1 Avg: | 405m3/s |
| Basin Size: | 99000km2 |
| Tributaries Right: | Morkoka |
| Pushpin Map: | Russia Sakha Republic#Russia |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
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 1181km (734miles) long, with a drainage basin of 99000km2. Its average discharge is 405m3/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 518km (322miles) from its mouth.