| Siagne | |
| Pushpin Map: | France#France Provence-Alpes-Côte d'Azur |
| Source1 Location: | near Escragnolles |
| Mouth Location: | Mediterranean Sea |
| Mouth Coordinates: | 43.531°N 6.9482°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | France |
| Length: | 44km (27miles) |
| Source1 Elevation: | 640m (2,100feet) |
| Discharge1 Avg: | Mediterranean Sea |
| Basin Size: | 512km2 |
The Siagne (pronounced as /fr/; oc|Sianha) is a river that flows through the Var and Alpes-Maritimes departments of southeast France. It is 44.5km (27.7miles) long. For much of its length, it forms the border between the two departments. Its drainage basin is 512km2.[1] Its source is near Escragnolles, flowing southeast, through Saint-Cézaire-sur-Siagne and Pégomas, and into the Mediterranean Sea in Mandelieu-la-Napoule, 5km (03miles) west of Cannes.