Geavdnjajávri is a lake in Bardu Municipality in Troms county, Norway. It is located inside Rohkunborri National Park, approximately 3.5 km (2.2 mi) from the border with Sweden.
The lake has a surface area of 18.85 km² (7.28 sq mi) and lies at an elevation of 540 m (1,770 ft) above sea level. Its maximum length is 13 km (8.1 mi) and its maximum width is 2.5 km (1.6 mi), with a shoreline length of 34.4 km (21.4 mi).
The primary outflow of Geavdnjajávri is the river Gulmmaeeatnu, which flows into the lake Leinavatn, then into the lake Altevatnet. Altevatnet empties into the river Barduelva, which in turn flows into the river Målselva. The lake's catchment area is part of the Målselva river system.
Geavdnjajávri is situated within Rohkunborri National Park, which was established in 2011. The lake is a remote mountain lake known for its northern landscapes.
