| Zboiul | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Giurgiu, Călărași |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Zboiu, Căscioarele |
| Length: | 28km (17miles) |
| Mouth: | Danube |
| Mouth Coordinates: | 44.0581°N 26.6085°W |
| Basin Size: | 86km2 |
The Zboiul is a small left tributary of the river Danube in Romania. It discharges into the Danube just upstream of the confluence of Danube and Argeș, west of Oltenița. Its length is 28km (17miles) and its basin size is 86km2.