The Sebeș is a left tributary of the river Mureș in Transylvania, Romania. The upper reach of the river is also known as Frumoasa. The Romanian and Hungarian name Sebeș and Sebes originate from the Hungarian adjective sebes meaning "speedy", while the German name means Mill Creek. The source of the river is on the south slope of the Cindrel Mountains, in the southwestern part of Sibiu County. It flows through the reservoirs Oașa and Tău. It discharges into the Mureș in Oarda, near Alba Iulia. Its length is 96 km (60 mi) and its basin size is 1,304 km2 (503 sq mi).