| Unnukka | |
| Pushpin Map: | Finland |
| Coords: | 62.4167°N 82°W |
| Outflow: | Ämmäkoski |
| Catchment: | Vuoksi |
| Basin Countries: | Finland |
| Area: | 80.451km2 |
| Depth: | 6.27m (20.57feet) |
| Max-Depth: | 41.12m (134.91feet) |
| Volume: | 0.504km3 |
| Shore: | 478.34km (297.23miles) |
| Elevation: | 81.3m (266.7feet) |
| Frozen: | December–April |
| Islands: | Leppäsalo (over 10 km2), Timonsalo, Tiheänsalo, Tervassalo, Pöyhönsaari ja Tanskansaari |
| Cities: | Leppävirta, Varkaus |
Unnukka is a medium-sized lake in Southern Savonia region in Finland with dozens of big and little islands. It belongs to Vuoksi main catchment area.[1] Unnukka's elevation is almost the same as the lake Savivesi's elevation, and it is possible to see them as one lake.