Dangyang (simplified Chinese: 当阳; traditional Chinese: 當陽; pinyin: Dāngyáng) is a city in western Hubei province, People's Republic of China, lying 70 kilometres (43 mi) east of the Gezhouba Dam on the Yangtze River.

Emperor Jing of Han established an administration in Dangyang on an area of 2,000 square kilometres (770 sq mi).

Sun Bin and Pang Juan, two famous strategists of the Warring States period (475–221 BC) studied military affairs from Gui Guzi at Daxian Cave in Dangyang.

While agriculture remains a key industry in Dangyang, industrial production now includes output in the areas of foodstuffs, building materials, textiles, chemicals, electronics, machinery, energy and packaging.

On August 11, 2016, an explosion at a chemical factory in Dangyang killed 21 people and injured at least 5.