| Brettach | |
| Map: | Brettach.png |
| Mouth Coordinates: | 49.2367°N 9.3239°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Baden-Württemberg |
| Length: | 42km (26miles) |
| Basin Size: | 154km2 |
The Brettach is a river in Baden-Württemberg, Germany. The 42 kilometers long Brettach flows into the Kocher in Neuenstadt am Kocher.