| Suuri-Onkamo | |
| Pushpin Map: | Finland |
| Coords: | 62.326°N 30.01°W |
| Type: | Lake |
| Basin Countries: | Finland |
| Area: | 32.107km2 |
| Depth: | 3.61m (11.84feet) |
| Max-Depth: | 9.4m (30.8feet) |
| Volume: | 0.114km3 |
| Shore: | 87.83km (54.58miles) |
| Elevation: | 77m (253feet) |
| Frozen: | December–April |
| Islands: | Pyhäsaari |
Suuri-Onkamo is a medium-sized lake in the Vuoksi main catchment area. It is located in the North Karelia region. It is situated about 20 kilometer from the border with Russia.[1] The lake is separated from another lake Pieni-Onkamo with nice esker called Sintsi. Third medium-sized lake near by is Särkijärvi. It has been said that compared to other Finnish lakes Suuri-Onkamo has different kind of climate, which comes from the lake Ladoga in the Russian side of the border.