Rois is a municipality in northwestern Spain, located in the province of A Coruña within the autonomous community of Galicia. It lies in the southwest of the province and belongs to the comarca of Sar.
The municipality is one of several small administrative divisions that make up the Sar region of Galicia, an area in Spain's northwest corner. As a Galician municipality, Rois shares in the broader cultural and administrative framework of the autonomous community.