Sanxia District (Chinese: 三峽區; Hanyu Pinyin: Sānxiá Qū; Tongyong Pinyin: Sansiá Cyu) is an urban district in the southwestern part of New Taipei City, Taiwan. It is the second largest district in New Taipei City after Wulai District. The old name of Sanxia, Saⁿ-kak-éng (Chinese: 三角湧; pinyin: Sānjiǎoyǒng; literally: "triangular surge") refers to the meeting of the Dahan River, Sansia River, and "Horizontal River" (橫溪). In 1920, Taiwan's Japanese government designated it an administrative area named Sankyō (三峽; Romaji: Sankyō; Pe̍h-ōe-jī: Sam-kiap): "Three Gorges".
- Zushi Temple - The most important religious site in Sanxia. Originally built in 1769 by Fukienese immigrants to Taiwan, it has been rebuilt three times, of which the last effort (beginning 1947) is the masterpiece of renown Taiwanese artist Li Meishu. It is considered by many to be the most intricately sculpted temple in Taiwan.
- Minquan Old Street (民權老街) - A business street built during the Japanese rule, it is a very well preserved example of Japanese colonial architecture of the time. The street features stores selling art, ceramics, and local specialty foods (most notably Bull Horn Croissants).
- Historical Relic Hall (三峽區歷史文物館) - preserves artistic and cultural artifacts from Sanxia's past.
- New Taipei City Hakka Museum - the largest Hakka cultural center in Taiwan exhibiting the culture, history, and influence of the Hakka people in Taiwan and abroad.
- Li Mei-shu Memorial Gallery (李梅樹紀念館) - art gallery showcasing the works of prominent Taiwanese artist Li Mei-shu.
- Sanxia History Museum
- National Taipei University Arts Boulevard
- Sanxia Agricultural Specialty Products Museum
- Tourism Factory of Cha-Shan-Fang Soap
- Pigs of God (神豬) Contest - The largest event held at Zushi Temple around Chinese New Year where farmers compete to raise the fattest pig. The fattest pig is then sacrificed to the local Taoist god Zushi-Ye (祖師爺). Controversial to animal rights activists, Zushi Temple is one of the few places in Taiwan that still practice this tradition.
- Sanxia Indigo Blue Dye Festival - A celebration of Sanxia's past as a major dyeing center in northern Taiwan.
- Car — Sanxia is served by Freeway No. 3. (San-ying Interchange)
- Bus — Sanxia is accessible by bus from Taipei (buses 702, 703, 705, 706,939), Taoyuan, and Yingge (Blue 19).
- Train — Although Sanxia does not have a train station, it is accessible by bus from Yingge Train Station across the river.
- MRT — Accessible via the Tucheng Line of the Taipei Metro to Yongning (永寧). Bus 916 from exit 1 connects to Sanxia on Highway 3. In addition Bus 910 leaves from Fuzhong (府中) station in Banqiao. Both routes are multi-section tickets, paying on entry or exit.