| Starzlach | |
| Source1 Location: | Piesenkopf (1629 m) |
| Mouth Coordinates: | 47.4042°N 10.2315°W |
| Progression: | Breitach→ |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 8.2km (05.1miles) |
| Mouth Elevation: | 820m (2,690feet) |
| Tributaries Left: | Letzenbach |
| Tributaries Right: | Hörnlegraben |
Starzlach is a river in the Allgäu region of the Bavarian Alps. Located in the Northwest of (part of Oberstdorf) and west of Oberstdorf itself it flows into the river Breitach. Its main tributaries are Hörnlegraben and Letzenbach.