| Image Coa: | Wappen Deensen.png |
| Coordinates: | 51.8667°N 43°W |
| Image Plan: | Deensen in HOL.svg |
| State: | Niedersachsen |
| District: | Holzminden |
| Samtgemeinde: | Eschershausen-Stadtoldendorf |
| Elevation: | 258 |
| Area: | 11.02 |
| Postal Code: | 37627 |
| Area Code: | 05532 |
| Licence: | HOL |
| Gemeindeschlüssel: | 03 2 55 007 |
| Divisions: | 3 |
| Mayor: | Hans-Dieter Ullmann |
| Party: | SPD |
Deensen is a municipality in the district of Holzminden, in Lower Saxony, Germany.
The internationally well known sculptor Ursula von Rydingsvard was born there.