| Sok | |
| Mouth Coordinates: | 53.4092°N 50.1322°W |
| Subdivision Type1: | Country |
| Length: | 364km (226miles) |
| Discharge1 Avg: | 33.3m3/s |
| Basin Size: | 11700km2 |
Sok (Russian: Сок) is a river in Samara and Orenburg Oblasts, Russia, a left tributary of the Volga. It is 364km (226miles) long, and its drainage basin covers 11700km2.[1] It flows southwest to meet the Samara Bend of the Volga near Sokolyi Mountains, north of the city of Samara. The major tributary is Kondurcha.
Europe's oldest pottery was found on the banks of the Sok River (see Elshanka culture for details).