| Kannonselkä | |
| Pushpin Map: | Finland |
| Location: | Kannonkoski |
| Coords: | 62.9°N 40°W |
| Type: | Lake |
| Inflow: | Pajusalmi |
| Outflow: | Kannonkoski rapids |
| Catchment: | Kymijoki |
| Basin Countries: | Finland |
| Area: | 11.236km2 |
| Depth: | 4.74m (15.55feet) |
| Max-Depth: | 19.44m (63.78feet) |
| Volume: | 0.0538km3 |
| Shore: | 49.41km (30.7miles) |
| Elevation: | 140.7m (461.6feet) |
| Frozen: | December–April |
| Islands: | Räihänsaari |
Kannonselkä (also called Kannonjärvi) is a medium-sized lake of Central Finland in the Kymijoki main catchment area. It is in the area of Kannonkoski municipality.[1] The lake is in quite natural condition and there are good possibilities for fishing.[2] There are several archaeological settlement places in Otaniemi on the lake shore.[3]