| Sone River | |
|---|---|
 | |
 | |
| Location | |
| Country | India |
| State | Chhattisgarh, Madhya Pradesh, Uttar Pradesh, Jharkhand, Bihar |
| Region | Baghelkhand, Bhojpur-Purvanchal and Magadha |
| Cities | Sidhi, Dehri, Daudnagar, Chopan, Arwal, Koilwar |
| Physical characteristics | |
| Source | |
| • location | Pendra, Chhattisgarh |
| • coordinates | 22°43′48″N 82°03′31″E / 22.73000°N 82.05861°E |
| Mouth | Ganges River |
• location | Maner, Patna district, Bihar |
• coordinates | 25°42′21″N 84°51′44″E / 25.70583°N 84.86222°E |
| Length | 784 km (487 mi) |
| Discharge | |
| • location | Ganges River |
| Basin features | |
| Tributaries | |
| • left | Ghaghar River, Johilla River, Chhoti Mahanadi River |
| • right | Banas River, Gopad River, Rihand River, Kanhar River, North Koel River |
Sone River, also spelt Son River, is a perennial river located in central India. It originates near Amarkantak Hill in Pendra (Gaurela-Pendra-Marwahi district), Chhattisgarh and finally merges with the Ganges river near Maner in Patna, Bihar. The Sone River is the second-largest southern tributary of the Ganges after the Yamuna River. India's oldest river bridge Koilwar Bridge over Sone River connects Arrah with Patna. Sone river is famous for its sand across country. Multiple dams and hydro-electric projects run on its course towards the Ganges.