Dongshan District (Chinese: 東山區; pinyin: Dōngshān Qū; Wade–Giles: Tung1-shan1 Ch'ü1; Pe̍h-ōe-jī: Tong-san-khu) is a rural district in Tainan, Taiwan.

It was formerly called Hoansia (Chinese: 番社; Pe̍h-ōe-jī: hoan-siā).

[1] During the Dutch era, the place was known as Dorko, and existed as a township called To-lo-koh in the early 20th century.

[2] After the handover of Taiwan from Japan to the Republic of China in 1945, Dongshan was organized as a rural township of Tainan County.

Dongshan, Dongzhong, Dongzheng, Dake, Sanrong, Keli, Donghe, Shengxian, Nanxi, Shuiyun, Lin’an, Dongyuan, Lingnan, Nanshi, Qingshan and Gaoyuan Villages.