| Nerkoonjärvi | |
| Pushpin Map: | Finland |
| Coords: | 63.4583°N 44°W |
| Lake Type: | Natural |
| Inflow: | Peltosalmi |
| Outflow: | Nerohvirta |
| Catchment: | Vuoksi |
| Basin Countries: | Finland |
| Area: | 15.664km2 |
| Depth: | 3.06m (10.04feet) |
| Max-Depth: | 11.97m (39.27feet) |
| Volume: | 0.048km3 |
| Shore: | 66.08km (41.06miles) |
| Elevation: | 85.8m (281.5feet) |
| Frozen: | December–April |
| Islands: | Luhtasaari, Heiskalansaari, Aittosaari |
| Cities: | Iisalmi, Lapinlahti |
Nerkoonjärvi is a medium-sized lake in the Vuoksi main catchment area. It is located in Iisalmi and Lapinlahti, in Northern Savonia region, Finland.[1]