| Flottbek | |
| Mouth Location: | Elbe |
| Mouth Coordinates: | 53.5477°N 9.8673°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | City |
| Subdivision Name2: | Hamburg |
Flottbek is a small river of Hamburg, Germany. It flows into the Elbe near Hamburg-Othmarschen.
It should not be confused with the, another tributary of the Elbe.