| Süderelbe | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Hamburg |
| River System: | Elbe |
The Süderelbe (pronounced as /de/) (Southern Elbe) is the biggest anabranch of the Unterelbe river in the area which is now the Port of Hamburg, Germany. Its natural flow path was redirected through the Köhlbrand.