| Pesio | |
| Map: | Pesio location map.jpg |
| Subdivision Type1: | Country |
| Subdivision Name1: | Italy |
| Subdivision Type2: | Region |
| Subdivision Name2: | Piedmont |
| Subdivision Type3: | Province |
| Subdivision Name3: | Province of Cuneo |
| Length: | 48.8km (30.3miles) |
| Discharge1 Location: | near Carrù |
| Discharge1 Avg: | 7.83[1] |
| Source1 Location: | N side of the Marguareis (Ligurian Alps) |
| Mouth: | Tanaro |
| Mouth Coordinates: | 44.4701°N 7.8913°W |
| Basin Size: | 401.9km2 |
| Tributaries Left: | Brobbio |
| Tributaries Right: | Pogliole, Branzola |
The Pesio is a 48.8km (30.3miles)[2] long river in northwestern Italy (Piedmont).
The river is a tributary to the river Tanaro, which is a tributary of the river Po. Its source is on the Northern slopes of the Marguareis, the highest summit of the Ligurian Alps. It flows northwards digging the Valle Pesio, which ends in the Po plain near Chiusa di Pesio.[3] The Pesio then follows its course through the plain heading North up to Morozzo, where it gets from the left its main tributary, the Brobbio, and turns NE. Then, with some meander, reaches the Tanaro a couple of km South of Carrù.[4]