| Blankenwaters Wiesengraben | |
| Mouth Location: | Süstedter Bach |
| Mouth Coordinates: | 52.9559°N 8.9077°W |
| Progression: | Süstedter Bach→ |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Lower Saxony |
Blankenwaters Wiesengraben is a small river of Lower Saxony, Germany. It flows into the Süstedter Bach west of Riede.