| Type: | Stadtteil |
| Town: | Raguhn-Jeßnitz |
| Image Coa: | DE-ST 15-0-82-301 Retzau COA.png |
| Coordinates: | 51.7333°N 31°W |
| State: | Sachsen-Anhalt |
| District: | Anhalt-Bitterfeld |
| Elevation: | 80 |
| Area: | 4.59 |
| Population: | 389 |
| Stand: | 2006-12-31 |
| Postal Code: | 06779 |
| Area Code: | 034906 |
Retzau 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 Raguhn-Jeßnitz.