| No. | 21 | View Larger Map |
| INDEX | ONEGA | |
| ENGLISH NAME | Lake Onega | |
| LOCAL NAME | Ozero Onezhskoye | |
| CONTINENT | Europe | |
| NATIONS | Russia | |
| Latitude (deg) | 61.50 | |
| Longitude (deg) | 35.75 | |
| Area (km2) | 9,900 | |
| Maximum depth (m) |
120 | |
| Volume (km3) | 290 | |
| Elevation (m) | 35 | |
| Bottom Level (m) |
-85 | |
| fresh/salt | fresh |