| Lake Kero | |
| Pushpin Map: | Finland |
| Location: | Kuusamo |
| Coords: | 65.667°N 29.157°W |
| Type: | lake |
| Catchment: | Iijoki |
| Basin Countries: | Finland |
| Area: | 20.925km2 |
| Depth: | 3.42m (11.22feet) |
| Max-Depth: | 17.5m (57.4feet) |
| Volume: | 0.0715km3 |
| Shore: | 51.73km (32.14miles) |
| Elevation: | 236.5m (775.9feet) |
| Frozen: | November–May |
| Islands: | Iso Käsmänsaari |
| Cities: | Kuusamo |
Lake Kero is a medium-sized lake in Finland. It is situated in Kuusamo municipality in the Northern Ostrobothnia region, and it belongs to the Iijoki main catchment area. The southern part of the lake is called Iso-Kero and the northern part is called Keski-Kero.[1]