Thedinghausen (; or ) is a municipality in the district of Verden, in Lower Saxony, Germany. It is situated on the left bank of the Weser, approx. 15 km west of Verden, and 20 km southeast of Bremen.
Thedinghausen is also the seat of the Samtgemeinde ("collective municipality") Thedinghausen.
It was an exclave of Braunschweig until 1972.