Danyang is a county-level city in China, located on the southwest bank of the Yangtze River. It is under the administration of Zhenjiang in Jiangsu province. The city covers a total area of 1,059 square kilometres and had a population of roughly 988,900 in 2020.
Danyang is noted for the production of optical lenses used in sunglasses and eyeglasses. Its residents speak a dialect of Wu Chinese, and the city lies on the linguistic borderline between Wu Chinese and Jianghuai Mandarin.