Baddeckenstedt is a Samtgemeinde ("collective municipality") in the district of Wolfenbüttel, in Lower Saxony, Germany. Its seat is in the village Baddeckenstedt.

The Samtgemeinde Baddeckenstedt consists of the following municipalities:

1. Baddeckenstedt
2. Burgdorf
3. Elbe
4. Haverlah
5. Heere
6. Sehlde