Üyük is a village in Şarkışla District, in Sivas Province, Türkiye. Üyük lies at 1,248 m above sea level, 2.8 km from the İncebel Dağları mountains. It has 191 inhabitants. The nearest city is Şarkışla, 4.3 km to the southwest. Among the landmarks around are Maksutlu Dam (4.0 km), Yapıaltın Dam (8.6 km) and Šamuḫa (29 km).