| Grafhorst | |
| Image Coa: | DEU Grafhorst COA.svg |
| Coordinates: | 52.45°N 67°W |
| Image Plan: | Grafhorst in HE.svg |
| State: | Niedersachsen |
| District: | Helmstedt |
| Samtgemeinde: | Velpke |
| Elevation: | 58 |
| Area: | 9.65 |
| Postal Code: | 38462 |
| Area Code: | 05364 |
| Licence: | HE |
| Gemeindeschlüssel: | 03 1 54 007 |
| Website: | www.grafhorst.de |
| Mayor: | Klaus Wenzel |
| Party: | SPD |
Grafhorst is a municipality in the district of Helmstedt, in Lower Saxony, Germany.