| Kynsivesi–Leivonvesi | |
| Pushpin Map: | Finland |
| Location: | Hankasalmi, Konnevesi, Laukaa |
| Coords: | 62.4167°N 41°W |
| Outflow: | Simunankoski rapids, to the lake Kuusivesi |
| Catchment: | Kymijoki |
| Basin Countries: | Finland |
| Area: | 54.134km2 |
| Depth: | 6.94m (22.77feet) |
| Max-Depth: | 48m (157feet) |
| Volume: | 0.376km3 |
| Shore: | 188.1km (116.9miles) |
| Elevation: | 87.8m (288.1feet) |
| Frozen: | December–April |
Kynsivesi–Leivonvesi is a medium-sized lake of Central Finland, in the municipalities of Laukaa, Hankasalmi and Konnevesi. It belongs to the Kymijoki main catchment area.[1] The outflow to the lake Kuusvesi is Simunankoski rapids.