The Ilm is a river in Bavaria, Germany, left tributary of the Abens.

Its source is near Altomünster.

It flows generally north through the small towns Hilgertshausen-Tandern, Reichertshausen, Pfaffenhofen an der Ilm, Geisenfeld and Vohburg.

It flows into the Abens near Neustadt an der Donau.

This article related to a river in Bavaria is a stub.