Coordinates: 24°37′55″N 120°56′12″E / 24.632038°N 120.936787°E
Sanwan Township (Chinese: 三灣鄉; pinyin: Sānwān Xiāng; Pe̍h-ōe-jī: Sam-oan-hiong) is a rural township in northern Miaoli County, Taiwan. It lies between the Taiwan Strait on the west and mountains on the east.
The township comprises eight villages: Beipu, Dahe, Daping, Dingliao, Neiwan, Sanwan, Tongjing and Yonghe.