| Boca | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Galați County |
| Subdivision Type3: | Cities |
| Subdivision Name3: | Galați |
| Length: | 15km (09miles) |
| Mouth: | Siret |
| Mouth Coordinates: | 45.401°N 27.992°W |
| Basin Size: | 72km2 |
| Tributaries Right: | Făloaia |
| Custom Label: | River code |
| Custom Data: | XII.1.86 |
The Cătușa is a left tributary of the river Siret in Romania. It flows into the Siret near the city Galați.[1] The basin size of the 15km (09miles) long Cătușa is 72km2.