Dongshan District () is a rural district in Tainan, Taiwan. It was formerly called Hoansia ().
During the Dutch era, the place was known as Dorko, and existed as a township called To-lo-koh in the early 20th century.
After the handover of Taiwan from Japan to the Republic of China in 1945, Dongshan was organized as a rural township of Tainan County. On 25 December 2010, Tainan County merged with Tainan City and Dongshan was upgraded to a district of the city.
Dongshan, Dongzhong, Dongzheng, Dake, Sanrong, Keli, Donghe, Shengxian, Nanxi, Shuiyun, LinâÂÂan, Dongyuan, Lingnan, Nanshi, Qingshan and Gaoyuan Villages.
Dongshan is famous for its coffee crop.