Sidu may refer to:
People Dhanurjaya Sidu, Indian politician Majed Abu-Sidu (born 1985), Palestinian football player
Places Seyyedan, Khusf, or Sīdu, Iran Sidu, Guidong County, a town in Guidong County, Hunan Province, China Sidu River, crossed by the Sidu River Bridge, Badong County, Hubei Province, China
Other Sidu (TV series), a 2016–2022 Sri Lankan drama series