Situ or situs may refer to:
Latin In situ, Latin phrase meaning on-site or in-place Situs (law), a legal term meaning "site" where a law applies In biology, situs refers to the disposition of organs in organisms with left-right asymmetry Situs solitus, the normal position of organs Situs inversus, the inverted disposition of organs Situs ambiguus (heterotaxia), comprises mixed cases where only some organs are inverted
Chinese Situ (office), a high-ranking government position in ancient China Situ (surname), a surname derived from the office, also romanised Szeto, Seto, or Soohoo Situ language, spoken in Sichuan, China
Tibetan Situ Panchen (1700–1774), 8th Tai Situ Rinpoche, an influential Tibetan