| Korssjøen | |
| Pushpin Map: | Trøndelag#Norway |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the lake |
| Coordinates: | 62.4328°N 11.5411°W |
| Location: | Røros, Trøndelag |
| Basin Countries: | Norway |
| Area: | 8.22km2 |
| Reference: | NVE |
Korssjøen is a lake in the municipality of Røros in Trøndelag county, Norway. The lake is located about southeast of the town of Røros. The lake Rambergsjøen lies about to the north and the lake Flensjøen lies about to the east.[1]