Coordinates: 24°25′22″N 121°03′02″E / 24.422769°N 121.050689°E
Tai'an Township (Chinese: 泰安鄉; pinyin: Tài'ān Xiāng) is a mountain indigenous township in southeastern Miaoli County, Taiwan. It is the largest township in Miaoli County.
Tai'an Township is a mountainous region without convenient transportation both between villages and between Tai'an itself and outside townships. More than two thirds of the population consists of the Atayal people of the Taiwanese aborigines. The sources of the Houlong and Da-an rivers are found in the township.
The township comprises eight villages: Bagua, Daxing, Jinshui, Meiyuan, Qingan, Shilin, Xiangbi and Zhongxing.