Arcuș (Hungarian: Árkos [ˈaːrkoʃ]) is a commune in Covasna County, Transylvania, Romania.

Arcuș previously formed part of the Székely Land region of the historical Transylvania province.

The commune lies in a hilly area between the Baraolt and the Bodoc [ro] mountains, at an altitude of 573 m (1,880 ft), on the banks of the river Arcuș.

Arcuș is crossed by the county road DJ121B, which runs from Sfântu Gheorghe to Valea Crișului, where it ends in DJ121A.

The Arcuș train station serves the CFR Main Line 400, which connects Brașov with the northwestern city of Satu Mare.