Sanxia District (traditional Chinese: 三峽區; simplified Chinese: 三峡区; Hanyu Pinyin: Sānxiá Qū; Tongyong Pinyin: Sansiá Cyu; Pe̍h-ōe-jī: Sam-kiap-khu) is a district in the southwestern part of New Taipei, Taiwan. It is the second largest district in New Taipei City by area after Wulai District.