| Pielavesi | |
| Location: | Northern Savonia |
| Coords: | 63.3°N 61°W |
| Inflow: | rivers Koivujoki and Lampaanjoki |
| Pushpin Map: | Finland |
| Outflow: | Säviänvirta, to the lake Nilakka |
| Catchment: | Kymijoki |
| Basin Countries: | Finland |
| Length: | 4km-7kmkm (02miles-04mileskm) |
| Width: | 22km (14miles) |
| Area: | 110.098km2 |
| Max-Depth: | 29m (95feet) |
| Shore: | 419.71km (260.8miles) |
| Elevation: | 102.3m (335.6feet) |
| Islands: | over 500 islands, biggest Kirkkosaari |
Pielavesi is a large lake in the Kymijoki main catchment area in Northern Savonia, Finland. It is situated in the municipality of Pielavesi.[1]