| Lake Suwa | |
|---|---|
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  Lake Suwa Location in Japan | |
| Location | Nagano prefecture |
| Coordinates | 36°02′54″N 138°05′03″E / 36.04833°N 138.08417°E |
| Primary inflows | 31 small rivers of the Kiso Mountains |
| Primary outflows | Tenryū River |
| Basin countries | Japan |
| Surface area | 13.3 km2 (5.1 sq mi) |
| Average depth | 4.7 m (15 ft) |
| Max. depth | 7.2 m (24 ft) |
| Shore length1 | 15.9 km (9.9 mi) |
| Surface elevation | 759 m (2,490 ft) |
| Settlements | Okaya, Suwa, Shimosuwa |
| 1 Shore length is not a well-defined measure. | |
Lake Suwa (諏訪湖, Suwa-ko) is a lake in the Kiso Mountains, in the central region of Nagano Prefecture, Japan.