Siwei may refer to:
People Cheng Siwei, Chinese economist, chemical engineer and politician MaSiWei (马思唯 Siwei Ma), member of Higher Brothers Zheng Siwei, Chinese badminton player
Place Siwei Subdistrict, a township-level division of Jingxing Mining District, Shijiazhuang, Hebei, China Sihwei village (四維村), a village in Nangan Township, Lienchiang County
See also Chou Hsi-wei (Jhou Siwei, 周錫瑋; pinyin: Zhōu Xíwěi), Taiwanese politician Jiugong Tunnel or Siwei Tunnel, a tunnel in Lieyu Township, Kinmen County Sihwei Elementary School metro station, a metro station of the Taichung Metro