| Bayerbacher Bach | |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Subdivision Name2: | Bavaria |
| Source1 Location: | near Paindlkofen |
| Mouth Location: | Kleine Laber near Habelsbach |
| Mouth Coordinates: | 48.8051°N 12.3149°W |
| Progression: | Kleine Laber→ |
| Length Km: | 16.36 |
| Discharge1 Avg: | ±0.072m3/s |
| Basin Size Km2: | 75.09 |
The Bayerbacher Bach or Bayerbach is a stream in Bavaria, Germany. It is a tributary of the Kleine Laber in Lower Bavaria.
From its source in the Landshut district near Paindlkofen, a district of the municipality Ergoldsbach, the Bayerbacher Bach mostly flows in the north direction. Among others the stream runs through Feuchten, Bayerbach and Greilsberg.
Then it enters the district Straubing-Bogen. Finally it reaches the municipality of Laberweinting. There, near Habelsbach, the Bayerbacher Bach issues into the Kleine Laber.