| Sioule | |
| Map: | Sioule.png |
| Mouth Coordinates: | 46.3658°N 3.3197°W |
| Subdivision Type1: | Country |
| Length: | 164km (102miles) |
| Source1 Elevation: | 1090m (3,580feet) |
| Mouth Elevation: | 222m (728feet) |
| Discharge1 Avg: | 26m3/s |
| Basin Size: | 2468km2 |
The Sioule (pronounced as /fr/; oc|Siula) is a 164km (102miles) long river in central France, a left tributary of the river Allier. Its source is near the village of Orcival, north of Mont-Dore, in the Massif Central. The Sioule has cut a deep gorge, especially in its upper course. The Sioule flows generally northeast through the following departments and towns:
The Sioule flows into the river Allier at La Ferté-Hauterive, 10 km (6 mi) north of Saint-Pourçain-sur-Sioule.
Its main tributaries are the Sioulet and the Bouble.
The Fades viaduct, the tallest railway bridge in France, is located on the Sioule.