Eystrup was a Samtgemeinde ("collective municipality") in the district of Nienburg, in Lower Saxony, Germany. Its seat was in the village Eystrup. On 1 January 2011, it merged with the Samtgemeinde Grafschaft Hoya.
The Samtgemeinde Eystrup consisted of the following municipalities:
Coordinates: 52°46′34″N 9°13′01″E / 52.776°N 9.217°E