| Lake Sirio | |
| Pushpin Map: | Italy Piedmont |
| Location: | Metropolitan City of Turin, Piedmont |
| Coords: | 45.4869°N 7.8839°W |
| Inflow: | underwater springs |
| Catchment: | 1.4km2 |
| Basin Countries: | Italy |
| Length: | 0.9km (00.6miles) |
| Width: | 0.45km (00.28miles) |
| Area: | 0.29km2 |
| Max-Depth: | 43.5m (142.7feet) |
| Shore: | 3.33km (02.07miles) |
| Elevation: | 266m (873feet) |
Lake Sirio (Italian: Lago Sirio) is a lake in northern Italy. Located between the comunes of Ivrea and Chiaverano, it is the largest of a group of five glacial lakes known as Laghi di Ivrea. The historic Società Canottieri Sirio, founded in 1887, occupies its southern shore.