Oldendorf is a Samtgemeinde ("collective municipality") in the district of Stade, in Lower Saxony, Germany. Its seat is in the village Oldendorf.
The Samtgemeinde Oldendorf consists of the following municipalities:
- Burweg
- Estorf
- Heinbockel
- Kranenburg
- Oldendorf
Coordinates: 53°34′44″N 9°15′54″E / 53.579°N 9.265°E / 53.579; 9.265