Stadtoldendorf was a Samtgemeinde ("collective municipality") in the district of Holzminden, in Lower Saxony, Germany. Its seat was in the town Stadtoldendorf. On 1 January 2011, it merged with the former Samtgemeinde Eschershausen to form the new Samtgemeinde Eschershausen-Stadtoldendorf.
The Samtgemeinde Stadtoldendorf consisted of the following municipalities:
Coordinates: 51°53′N 9°37′E / 51.883°N 9.617°E