| Type: | Stadtteil |
| Town: | Zerbst |
| Image Coa: | DE-ST 15-0-82-430 Walternienburg COA.png |
| Coordinates: | 51.9667°N 66°W |
| State: | Sachsen-Anhalt |
| District: | Anhalt-Bitterfeld |
| Elevation: | 53 |
| Area: | 18.77 |
| Population: | 519 |
| Stand: | 2008-12-31 |
| Postal Code: | 39264 |
| Area Code: | 039247 |
| Licence: | ABI |
Walternienburg is a village and a former municipality in the district of Anhalt-Bitterfeld, in Saxony-Anhalt, Germany. Since 1 January 2010, it is part of the town Zerbst.
The Barby Ferry, a cable ferry across the Elbe, links Walternienburg with Barby.