Oldzho
| Oldzho Yakut: Олдьо | |
|---|---|
| Location in the Sakha Republic, Russia | |
| Location | |
| Country | Russia | 
| Physical characteristics | |
| Source | |
| • location | Khadaranya Range | 
| • coordinates | 68°38′35″N 138°08′38″E / 68.64306°N 138.14389°E | 
| • elevation | 1,100 m (3,600 ft) | 
| Mouth | Yana River | 
|  • coordinates | 68°25′13″N 134°54′25″E / 68.42028°N 134.90694°E | 
|  • elevation | 102 m (335 ft) | 
| Length | 330 km (210 mi) | 
| Basin size | 16,100 km2 (6,200 sq mi) | 
| Discharge | |
| • average | 110 m3/s (3,900 cu ft/s) | 
| Basin features | |
| Progression | Yana→ Laptev Sea | 
The Oldzho (Russian: Ольджо; Yakut: Олдьо, romanized: Olco), also known as Oldyo (Russian: Ольдё) or Olduo (Yakut: Олдьуо, romanized: Olcuo), is a river in the Verkhoyansk District, Sakha Republic, Russia. It is a right tributary of the Yana.
The length of the river is 330 kilometres (210 mi) and the area of its drainage basin 16,100 square kilometres (6,200 sq mi). There are no settlements near the river. The nearest city is Batagay, and the nearest airfield Batagay Airport.