| Art: | Ortsteil |
| Municipality: | Remlingen-Semmenstedt |
| Image Coa: | DE-NI 03-1-58-040 Semmenstedt COA.svg |
| Coordinates: | 52.1°N 52°W |
| State: | Niedersachsen |
| District: | Wolfenbüttel |
| Elevation: | 106 |
| Area: | 11.71 |
| Population: | 676 |
| Stand: | 2015-12-31 |
| Postal Code: | 38327 |
| Area Code: | 05336 |
| Licence: | WF |
Semmenstedt is a village and a former municipality in the district of Wolfenbüttel, in Lower Saxony, Germany. Since 1 November 2016, it is part of the municipality Remlingen-Semmenstedt.