| Jonkeri | |
| Pushpin Map: | Finland |
| Coords: | 63.8333°N 84°W |
| Outflow: | Siltakoski rapids, river Jongunjoki |
| Basin Countries: | Finland |
| Area: | 13.981km2 |
| Depth: | 3.91m (12.83feet) |
| Max-Depth: | 18.8m (61.7feet) |
| Volume: | 0.0547km3 |
| Shore: | 73.55km (45.7miles) |
| Elevation: | 195.6m (641.7feet) |
| Frozen: | November–May |
| Islands: | Uittosaari, Lammassaari, Kalmosaari, Kontusaari |
Jonkeri is a medium-sized lake in Kuhmo, Finland. It belongs to the Vuoksi main catchment area and is situated in Kainuu region.[1]
The Russian border is only four kilometers from the lake. Historically the lake has been a border between Sweden and Russia. The border stone called Jonkerinkivi is situated on the lake and it shows the border place of 17th century based on the Treaty of Stolbovo.[2]