| Isa | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Belarus |
| Mouth: | Shchara |
| Mouth Coordinates: | 53.1068°N 25.3299°W |
| Progression: | Shchara→ |
The Isa (Belarusian: Іса) is a river of Belarus. It is a right tributary of the Shchara, which it joins in the city of Slonim in western Belarus.