| Coordinates: | 52.7833°N 26°W |
| Image Plan: | Hämelhausen in NI.svg |
| State: | Niedersachsen |
| District: | Nienburg/Weser |
| Samtgemeinde: | Grafschaft Hoya |
| Elevation: | 19 |
| Area: | 9.07 |
| Postal Code: | 27324 |
| Area Code: | 04254 |
| Licence: | NI |
| Gemeindeschlüssel: | 03 2 56 009 |
| Mayor: | Johann Meyer |
Hämelhausen is a municipality in the district of Nienburg, in Lower Saxony, Germany.