| Soci | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bacău County |
| Length: | 19km (12miles) |
| Mouth: | Siret |
| Mouth Coordinates: | 46.3218°N 27.0555°W |
| Basin Size: | 54km2 |
The Soci is a left tributary of the river Siret in Romania.[1] It discharges into the Siret near Pâncești. The basin size of the 19km (12miles) long Soci is 54km2.