| Coordinates | 52°43′N 09°04′E |
|---|---|
| State | Niedersachsen |
| District | Nienburg/Weser |
| Samtgemeinde | Weser-Aue |
| Elevation | 45 |
| Area | 40.41 |
| Postal code | 31613 |
| Area code | 05022 |
| Licence | NI |
| Gemeindeschlüssel | 03 2 56 036 |
| Website | www.marklohe.de |
| Mayor | Friedrich Sieling |
| Party | CDU |
Wietzen is a municipality in the district of Nienburg, in Lower Saxony, Germany.