Dongshi Township, also Dongshih Township, () is a rural township in Chiayi County, Taiwan.
After WWII, Dongshi Township was under the jurisdiction of Tainan County. In 1950, it was put under the jurisdiction of Chiayi County .
It has a population total of 23,327 and an area of 81.5821 km<sup>2</sup>. Its coastline is 14 km in total length.
Tungshi, Yuanshu, Xingcuo, Wengang, Sanjia, Yongtun, Haipu, Longgang, Pilai, Xiayi, Dingyi, Xixia, Gangkou, Aogu, Gangqi, Niaosong, Weitan, Zhouzi, Tunglun, Xilun, Wenzi, Wangliao and Zhangtan Village.
The township is connected to Shuishang Township through Provincial Highway 82.