| Type: | Ortsteil |
| Municipality: | Siemz-Niendorf |
| Coordinates: | 53.8167°N 65°W |
| State: | Mecklenburg-Vorpommern |
| District: | Nordwestmecklenburg |
| Elevation: | 18 |
| Area: | 14.68 |
| Population: | 308 |
| Stand: | 2017-12-31 |
| Postal Code: | 23923 |
| Area Code: | 038828 |
| Licence: | NWM |
| Website: | www.schoenberg-land.de |
Groß Siemz is a village and a former municipality in the Nordwestmecklenburg district, in Mecklenburg-Vorpommern, Germany. Since May 2019, it is part of the new municipality Siemz-Niendorf.