| Lake Seydozero | |
|---|---|
| Location | Kola Peninsula, Murmansk Oblast |
| Lake type | natural lake, reservoir |
| Basin countries | Russia |
| Max. length | 8 km |
| Max. width | 3 km |
| Surface elevation | 189 m |
Lake Seydozero (Russian: Сейдозеро, Kildin Sami: Сейдъявврь) is located on the Kola Peninsula, in Murmansk Oblast within the Lake Lovozero and ensures runoff from the Seydyavryok River.