| Affinger Bach | |
| Pushpin Map: | Germany |
| Pushpin Map Alt: | Mouth |
| Mouth Coordinates: | 48.4588°N 10.934°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | Location |
| Subdivision Name2: | Bavaria |
| Length: | 7.1km (04.4miles) |
The Affinger Bach is a river of Bavaria, Germany. It flows into the Friedberger Ach in Anwalting.