Sittensen is a Samtgemeinde ("collective municipality") in the district of Rotenburg, in Lower Saxony, Germany. Its seat is in the village Sittensen. The Samtgemeinde Sittensen consists of the following municipalities: Groß Meckelsen Hamersen Kalbe Klein Meckelsen Lengenbostel Sittensen Tiste Vierden Wohnste Samtgemeinden in Lower Saxony