| Image Coa: | Wappen Rohrsen.png |
| Coordinates: | 52.71°N 9.2322°W |
| Image Plan: | Rohrsen in NI.svg |
| State: | Niedersachsen |
| District: | Nienburg/Weser |
| Samtgemeinde: | Heemsen |
| Elevation: | 24 |
| Area: | 5.09 |
| Postal Code: | 31627 |
| Area Code: | 05024 |
| Licence: | NI |
| Gemeindeschlüssel: | 03 2 56 027 |
| Mayor: | Fritz Bormann |
| Party: | CDU |
Rohrsen is a municipality in the district of Nienburg, in Lower Saxony, Germany.