| Ilm | |
| Map: | Ilm (rivière).png |
| Mouth Coordinates: | 48.8286°N 11.76°W |
| Progression: | Abens→ |
| Subdivision Type1: | Country |
| Length: | 83.8km (52.1miles) |
| Basin Size: | 579km2 |
The Ilm is a river in Bavaria, Germany, left tributary of the Abens. Its source is near Altomünster. It is approx. 84 km long. 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.