| Münsterer Alte | |
| Mouth Coordinates: | 48.6575°N 10.8862°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 17.7km (11miles) |
| Source1 Elevation: | 430m (1,410feet) |
| Mouth Elevation: | 409m (1,342feet) |
Münsterer Alte (in its upper course: Altnet) is a river of Bavaria, Germany. It passes through Münster and flows into the Lech south of Rain.