Șieu-Măgheruș (Hungarian: Sajómagyarós) is a commune in Bistrița-Năsăud County, Transylvania, Romania.

It is composed of seven villages: Arcalia (Árokalja), Chintelnic (Kentelke), Crainimăt (Királynémeti), Podirei (Pogyerej), Sărățel (Szeretfalva), Șieu-Măgheruș, and Valea Măgherușului (Sajómagyarósi völgy).

The commune lies on the Transylvanian Plateau, on the banks of the river Șieu.

Șieu-Măgheruș is crossed by two national roads: DN17 [ro] (part of European route E58), which joins Dej in Cluj County to Suceava, and DN15A [ro] (part of European route E578), which joins Reghin in Mureș County to Bistrița; the two roads meet in the village of Sărățel.

There is also a train station in Sărățel, which serves the CFR Line 406, that runs from Bistrița Bârgăului to Bistrița North [ro] to here, and on to the town of Luduș, in Mureș County (the last segment is operated by Regio Călători).