The Condrusi are a Germanic tribe of ancient Belgium, which takes its name from the political and ethnic group known to the Romans as the Belgae.

The Condrusi are probably located in the region now known as Condroz, named after them, between Liège and Namur.

The terrain is wooded hills on the northeastern edge of the Ardennes.The Belgae are distinguished from the Celts and apparently claim to be of Germanic descent.

From Belgic names we know that the Belgae were heavily influenced by the Gaulish language, but from other information we know that they were also heavily influenced by Germanic peoples on the east of the Rhine river.

In particular, the Condrusi were in the tribal group known as the Germani cisrhenani, who are amongst the Belgae most strongly associated with Germanic ancestry.