The Dagu River () is a 180-km-long river in Shandong province, China, originating from Mount Fu () in Zhaoyuan, Shandong and emptying into the Jiaozhou Bay in Qingdao. It has a drainage area of 6131.3 km<sup>2</sup> and is responsible for over 85% of the fresh water supply to the Jiaozhou Bay.