| Blaise | |
| Map: | Blaise.png |
| Source1 Location: | Gillancourt |
| Source1 Coordinates: | 48.1586°N 4.9922°W |
| Mouth Location: | Marne |
| Mouth Coordinates: | 48.6281°N 4.6978°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | France |
| Length: | 85.6km (53.2miles) |
| Source1 Elevation: | 305m (1,001feet) |
| Mouth Elevation: | 110m (360feet) |
| Basin Size: | 480km2 |
The Blaise (in French pronounced as /blɛz/) is an 85.6km (53.2miles) long river in the Haute-Marne and Marne departments in northeastern France. Its source is in the village of Gillancourt. It flows generally northwest. It is a left tributary of the Marne into which it flows at Arrigny.
This list is ordered from source to mouth: