Coordinates: 26°22′36″N 120°30′24″E / 26.37667°N 120.50667°E
Dongyin Island (Chinese: 東引島; Dĕ̤ng-īng-dō̤) is an island in the Taiwan Strait off the coast of Fujian. The Dongyin Township (Chinese: 東引鄉; pinyin: Dōngyǐn Xiāng; Dĕ̤ng-īng-hiŏng), composed of Dongyin Island and Siyin Island, is a township of the Lienchiang County, Fukien Province, Republic of China.
The township was originally part of the Loyüan County before the ROC government evacuated to Taiwan in 1949 following the Chinese civil war.
It is claimed by the People's Republic of China government as part of the Luoyuan County of its Fuzhou prefecture.