| Liebenau | |
| Image Coa: | Wappen Liebenau.png |
| Coordinates: | 52.6°N 15°W |
| Image Plan: | Liebenau in NI.svg |
| State: | Niedersachsen |
| District: | Nienburg/Weser |
| Samtgemeinde: | Weser-Aue |
| Elevation: | 26 |
| Area: | 90.69 |
| Postal Code: | 31618 |
| Area Code: | 05023 |
| Licence: | NI |
| Gemeindeschlüssel: | 03 2 56 019 |
| Website: | www.liebenau.com |
| Mayor: | Hans-Georg Mühlenfeld |
| Party: | CDU |
Liebenau is a municipality in the district of Nienburg, in Lower Saxony, Germany. It is situated on the left bank of the Weser, approx. 10 km southwest of Nienburg, and 40 km northeast of Minden.
Liebenau was the seat of the former Samtgemeinde ("collective municipality") Liebenau.
The hamlet (Bauernschaft) of Reese is in Liebenau municipality.