| Teufelsbach | |
| Mouth Location: | Rhynerscher Bach |
| Mouth Coordinates: | 51.6317°N 7.8092°W |
| Progression: | Rhynerscher Bach→ Wiescher Bach→ |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
Teufelsbach, also called Ostfeldgraben and Freisker Bach, is a river of North Rhine-Westphalia, Germany. It is 2.91NaN1 long and is a left tributary of the Rhynerscher Bach.[1] It flows for most of its length through the city of Hamm.