| Official Name: | Sanxing Township 三星鄉 |
| Other Name: | Sansei |
| Settlement Type: | Rural township |
| Subdivision Type: | Location |
| Subdivision Name: | Yilan County, Taiwan |
| Area Total Km2: | 144.22 |
| Population As Of: | September 2023 |
| Population Total: | 21239 |
| Population Density Km2: | auto |
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 km2 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.