| Gásadatjávri | |
| Caption Map: | Interactive map of the lake |
| Coordinates: | 69.7313°N 24.3029°W |
| Location: | Finnmark |
| Basin Countries: | Norway |
| Area: | 2.56km2 |
| Reference: | NVE |
Gásadatjávri is a lake in Karasjok Municipality in Finnmark county, Norway. The 2.56km2 lake lies on the Finnmarksvidda plateau, about northeast of the large lake Iešjávri in the northwestern part of the municipality.[1]