Dawanshan Dao (), or Dawanshan Island, is an island in the southwest Wanshan Archipelago, offshore of Zhuhai, Guangdong in China. Xiaowanshan Dao () is located in the west of Dawanshan Dao. Dawanshan Dao has an area of 8.1 km<sup>2</sup> and a population of about 3,000. The seat of Wanshan Town () of Zhuhai is located on the island.
Dawanding () on Dawanshan Dao has an altitude of 443.13 m.
Dawanshan Dao is located in one of the major fishing areas of China. However, Perna viridis, a species of green mussel, was found to be contaminated by HCHs, DDTs, and PCBs. Dawanshan Dao has reservoirs because of the lack of sufficient freshwater.
Dawanshan Dao is accessible through ferry service from the Xiangzhou Northern Wharf () of Zhuhai.