| Grundhof Grumtoft | |
| Image Coa: | DEU Grundhof COA.svg |
| Coordinates: | 54.7667°N 48°W |
| Image Plan: | Grundhof in SL.PNG |
| State: | Schleswig-Holstein |
| District: | Schleswig-Flensburg |
| Amt: | Langballig |
| Elevation: | 24 |
| Area: | 11.56 |
| Postal Code: | 24977 |
| Area Code: | 04634 u. 04636 |
| Licence: | SL |
| Gemeindeschlüssel: | 01 0 59 118 |
| Website: | www.langballig.de |
| Mayor: | Bernd Wunder |
| Party: | CDU |
Grundhof (Danish: Grumtoft) is a municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany.