Aksu is a village in Suşehri District, in Sivas Province, Türkiye. Aksu lies at 1,665 m above sea level, in the Köse Dağları mountains. It has 416 inhabitants. The nearest city is Sivas, 95 km to the west. Among the landmarks around are Çamlıgöze Dam (15.9 km), Kılıçkaya Dam (21 km) and Saint Minas Church of Zara (22 km).