Sanxing Township (), also spelled Sanshing Township, is a rural township in the western part of Yilan County, Taiwan.
It has an area of 144.22 km<sup>2</sup> and estimate population of 21,239 people as of September 2023.
The township comprises 18 villages: Dayi, Dayin, Dazhou, Gongzhao, Guilin, Hangjian, Jiqing, Renhe, Shangwu, Shuangxian, Tianfu, Tianshan, Wande, Wanfu, Weiqian, Yide, Yuanshan and Yuemei.