Voghji (Armenian: Ողջի) is a river on the south slopes of the Lesser Caucasus range, and is a left tributary of Araks. It flows through the territory of Armenia and Azerbaijan.
In its upper reaches it has formed a deep canyon which, near the city of Kapan, turns into a wide valley. It is fed by a range of sources.
Along the coasts lie the cities of Kajaran and Kapan.
On the river there are Kapans and Voghji hydro-electric power stations.