The Cibin (German: Zibin; Hungarian: Szeben) is a river in central Romania, in the south part of Transylvania.

Close to the mountains, the river flows through the Mărginimea Sibiului area, known for its strong Romanian traditions.

Two of the biggest communes of Sibiu County – Gura Râului and Orlat – are situated on the river banks.

The economical importance or the river comes from the dam close to Gura Râului, which, besides generating electrical power, represents the biggest source of drinking water for the city of Sibiu.

Also a few construction aggregate quarries stations are situated on the river.