The Ilz () is a river running through the Bavarian Forest, Germany. It is a left tributary of the Danube. During its length (, including its main source river GroÃÂe Ohe), it travels down a height difference of ~140m.
The Ilz is formed at the confluence of its source rivers GroÃÂe Ohe and Kleine Ohe in Eberhardsreuth. In the city of Passau it finally enters the Danube. Another town on the Ilz is Fürsteneck.