New Taipei City Constituency III (Chinese: 新北市第三選舉區; pinyin: Xīnběi Shì Dì-sān Xuǎnjǔ Qū) includes most of Sanchong in New Taipei City.

The district was formerly known as Taipei County Constituency III (2008-2010) and acquired its present boundaries in 2008, when all local constituencies of the Legislative Yuan were reorganized to become single-member districts.