Mediumfjellet is a mountain northwest of Yoldiabukta in Oscar II Land at Spitsbergen, Svalbard.
It constitutes the southern part of the ridge Jämtlandryggen, and has several peaks and a length of 8 kilometers (5.0 mi).
The highest peak is Gavltinden to the north.
The mountain is located between the glaciers Sveabreen and Wahlenbergbreen.
This Spitsbergen mountain, mountain range, or peak related article is a stub.