| Syvänsi | |
| Pushpin Map: | Finland |
| Coords: | 62.345°N 27.52°W |
| Catchment: | Vuoksi |
| Basin Countries: | Finland |
| Area: | 14.935km2 |
| Depth: | 6.92m (22.7feet) |
| Max-Depth: | 38.62m (126.71feet) |
| Volume: | 0.103km3 |
| Shore: | 78.15km (48.56miles) |
| Elevation: | 102.2m (335.3feet) |
| Frozen: | December–April |
| Cities: | Jäppilä |
Syvänsi is a medium-sized lake in the Vuoksi main catchment area. It is located in the region Southern Savonia.[1]