| No. | 247 | View Larger Map |
| INDEX | FLATHEAD | |
| ENGLISH NAME | Flathead Lake | |
| LOCAL NAME | Flathead Lake | |
| CONTINENT | North America | |
| NATIONS | USA | |
| Latitude (deg) | 47.85 | |
| Longitude (deg) | -114.12 | |
| Area (km2) | 510 | |
| Maximum depth (m) |
113 | |
| Volume (km3) | 24 | |
| Elevation (m) | 881 | |
| Bottom Level (m) |
768 | |
| fresh/salt | fresh |