Otus may refer to:

  • Otus (education), a K-12 educational technology company
  • HMS Otus, two ships in the Royal Navy
  • Otus (bird), genus of owls
  • Otus (mythology), giant in Greek mythology, brother of Ephialtes, one of Aloadae
  • Otus of Cyllene, hero in Greek mythology, killed by Hector in Trojan War
  • USS Otus (ARG-20) (1940–1946), an internal combustion engine repair ship
  • "Otus the Head Cat", weekly column in the Arkansas Democrat-Gazette by Michael Storey
  • Otus (lens), high-performance lens series by Carl Zeiss AG
  • Tonmi Lillman or Otus (1973–2012), member of a band Lordi
  • "of the United States", as in POTUS (President of the United States), FLOTUS (First Lady of the United States), and SCOTUS (Supreme Court of the United States)
  • Moto E (2nd generation) 3G, a Motorola Android smartphone, codename otus
  • Otus, a playable character from the 2016 Video Game Owlboy from D-Pad Studio
  • Operational taxonomic unit, operational taxonomic units in biology

People with the surname

  • Erol Otus (21st century), American artist