| Pieni-Onkamo | |
| Pushpin Map: | Finland |
| Type: | Lake |
| Inflow: | Salmensillan salmi |
| Outflow: | Nivajoki |
| Catchment: | Vuoksi |
| Basin Countries: | Finland |
| Area: | 12.614km2 |
| Depth: | 2.46m (08.07feet) |
| Max-Depth: | 7.4m (24.3feet) |
| Volume: | 0.031km3 |
| Shore: | 47.57km (29.56miles) |
| Elevation: | 77m (253feet) |
| Frozen: | December–April |
| Islands: | Reposaari |
Pieni-Onkamo is a medium-sized lake in the Vuoksi main catchment area in Finland. It is located in the North Karelia region.[1] The lake is separated from another lake Suuri-Onkamo with nice esker called Sintsi.